Have You Tried

Starting from AutoCAD 2015, the classic workspace is no longer included as the default workspace.

To recreate the classic workspace, perform the following actions.

1, Display the Classic Menu

Click Quick Access Toolbar drop-down > Show Menu Bar

2, Hide the Ribbon

Click Tools menu > Palettes > Ribbon.

Note: Make sure you have a drawing open so the Tools menu is included.

3, Display the Toolbars You Require

  • Click Tools menu > Toolbars and select the required toolbar.
  • Repeat until all required toolbars are visible.

4, Save the Workspace

  1. Click Tools menu > Workspaces > Save Current As.
  2. In the Save Workspace dialog box, in the Name box, type AutoCAD Classic.
  3. Click Save.

How to Use a Script to Recreate the Classic Workspace Automaticly?

Download and run the script included in the Classic Workspace Script.zip file:

  1. Click the attached ZIP file to download it.
  2. Extract the ZIP file to find the ClassicWS.scr script file.
  3. Start AutoCAD.
  4. Drag the ClassicWS.scr file into any drawing window or use the SCRIPT command to run it.

Note: The ZIP attachment also contains CUIx files from AutoCAD 2014 and AutoCAD LT 2014. These files may be used to manually import the Classic Workspace as described later in this article.

See also:

Best Lightweight CAD With AutoCAD Classic Interface

DWGSee CAD– A lightweight CAD program with AutoCAD classic interface and lifetime license

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Layout viewports are objects that display views of model space. You create, scale, and place them in paper space on a layout.

On each layout, you can create one or more layout viewports. Each layout viewport is like a closed circuit TV monitor of a view of the model at a scale and orientation that you specify.

How to Create a New Layout Viewport?

  1. If necessary, click a layout tab.
  2. Set the current layer to a layer that’s reserved for layout viewports (recommended).The border visibility of layout viewports is controlled by layer visibility. Whether this layer is plotted is controlled by the setting in the Plot column in the Layer Properties Manager.
  3. Click Layout tabLayout Viewports panelInsert View.
  4. Do one of the following:
    • If named views have not been saved in model space, click two points to define a rectangular view from expanded model space. Press Enter to accept the results or click two more points.
    • If one or more named views were previously saved in model space, click to choose a named view from the gallery.
    • If one or more named views were previously saved in model space, click the New View button at the bottom of the gallery. Then, click two points to define a rectangular view from expanded model space. Press Enter to accept the results or click two more points.
  5. Right click to display a list of scales and click one of them.
  6. Click to place the layout viewport on the layout.
  • To adjust the size, shape, and border of the new layout viewport, select the layout viewport and click a size grip one of the corners of the viewport object.
  • To move the layout viewport, click the move grip at the center of the viewport and click a new location. Alternatively, you can use the Move command.
  • To change the display scale, click the triangular scale grip near the center of the layout viewport. You can also select the edge of the viewport object, and specify the viewport scale in the Properties palette.

How to Create a Nonrectangular Layout Viewport?

You can create a new viewport with nonrectangular boundaries by converting a geometric object created in paper space into a layout viewport using the MVIEW or -VPORTS command.

  • With the Object option, you can select a closed object, such as a circle or closed polyline created in paper space, to convert into a layout viewport. The object that defines the viewport boundary is associated with the viewport after the viewport is created.
  • With the Polygonal option, you can create a nonrectangular layout viewport by specifying points. The prompts are the same as the prompts for creating a polyline.
  1. If necessary, click a layout tab.
  2. Set the current layer to a layer that’s reserved for layout viewports (recommended).The border visibility of layout viewports is controlled by layer visibility.
  3. Click Layout tab>Layout Viewports panel>Rectangular, Polygonal, or Object.
  4. Follow the prompts.

Note: When you want to suppress the display of the boundary of a layout viewport, you should turn off the layer of the nonrectangular viewport instead of freezing it. If the layer of a nonrectangular layout viewport is frozen, the viewport is not clipped correctly.

How to Automatically Set Up Multiple Viewports on a Layout?

  1. Click Layout tab>Layout Viewports panel>Dialog box launcher. 
  2. In the Viewports dialog box, New Viewports tab, under standard viewports select a viewport configuration from the list.
  3. Under Setup, select either 2D or 3D.When you select 3D, a set of standard 3D views is applied to each viewport in the configuration.
  4. Under Viewport Spacing, select the amount of spacing you want to add between the viewports.
  5. To change a view, select a viewport in the preview image. Under Change View To, select a view from the list of standard views.The list includes top, bottom, front, back, left, right, and isometric views, along with any named views that are saved in the drawing. The selected view is displayed under Preview.
  6. Click OK.
  7. On the layout, specify two points to indicate the area to contain the viewport configuration.

How to Adjust the Layout Viewport?

After you create a layout viewport, you can change its size and properties, and also scale and move it as needed.

  • For control of all the properties of a layout viewport, use the Properties palette.
  • For the most common changes, select a layout viewport and use its grips.

How to Lock the scale of Layout Viewport?

To prevent accidental panning and zooming, each layout viewport has a Display Locked property that can be turned on or off. You can access this property from the Properties palette, the right-click menu when a layout viewport is selected, a button on the Layout Viewports tab on the ribbon, and a button on the status bar when one or more layout viewports are selected.

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When there are several layers in a drawing that need to be renamed, the best and fastest way is to use the “Rename” command.

How to Batch Rename Layers in AutoCAD?

At first, make sure that “Layers” is highlighted in the Named Objects listbox. In the “Items” listbox is a list of all of the layer names in the current drawing.

You wanted to rename all of the layers so that a “A-” preceeded the layer name like “A-Dim”

For example,in the “Old Name” textbox, you would put a “*” in this box which tells AutoCad to select all of the layers in the current drawing.

Then, go to the textbox under the “Old Name” textbox and put in “A-*”. Now, press the “Rename To:” button and Press “OK”.

You layers should now look like the following: “A-Dim”, “A-Doors”, “A-Text”, and “A-Walls”.

“*” See More Reference: Wild-Card Characters Reference in AutoCAD

How to Batch Rename Mutiple Blocks in AutoCAD?

The same method also can be used to rename multiple blocks

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Linetype is a visual property assigned to geometric objects. Linetypes can be a pattern of dashes, dots, text, and symbols, or unbroken and continuous.

The current linetype setting defines the default appearance of all new geometric objects. You can see which linetype is current in the Properties panel of the ribbon Home tab when no objects are selected.

The standard linetypes that come with the product are stored in two different library files, the names of those files is dependent on which product or products have been installed:

  • AutoCAD and AutoCAD-based products – acad.lin and acadiso.lin
  • AutoCAD LT product – acadlt.lin and acadltiso.lin

A standard library of linetypes is provided with your product that can be used as they are or modified to suit your needs. You can also create your own custom linetypes.

Linetype Definitions

Linetypes are defined in one or more linetype definition files that have a .lin file extension.

The linetype name and definition determine the particular dash-dot sequence, the relative lengths of dashes and blank spaces, and the characteristics of any included text or shapes. You can use the linetypes as they are, modify them, or create your own custom linetypes.

The following is an example of a linetype definition. The numbers represent the lengths of dashes and spaces, and the 0 represents a dot.

*BORDER,Border __ __ . __ __ . __ __ . __ __ . __ __ .
A,.5,-.25,.5,-.25,0,-.25

A LIN file can contain definitions of many simple and complex linetypes. You can add new linetype definitions to an existing LIN file or you can create new definitions by editing a LIN file using a text editor.

After you create or modify a linetype, you must load the linetype into your current drawing before you can use it.

How to Create a Simple Custom Linetype?

You can define a custom linetype with different patterns of dots, spaces, and dashes by creating or editing a linetype definition (LIN) file using a text editor. Once defined, you can load and use the custom linetype in any drawing file.

Each linetype is defined on two lines in a linetype definition file.

The first line contains the linetype name and an optional description. The second line is the code that defines the actual linetype pattern.

The second line must begin with the letter A (alignment), followed by a list of pattern descriptors that define pen-up lengths (spaces), pen-down lengths (dashes), and dots. You can include comments in a LIN file by beginning the line with a semicolon (;).

Linetype Definition Format

The format of the linetype definition is

*linetype_name,description 
A,descriptor1,descriptor2, ...

For example, a linetype called DASHDOT is defined as

*DASHDOT,Dash dot __ . __ . __ . __ . __ . __ . __ . __ 
A,.5,-.25,0,-.25

The example indicates a repeating pattern starting with a dash 0.5 drawing units long, a space 0.25 drawing units long, a dot, and another space 0.25 drawing units long. This pattern continues for the length of the line, ending with a dash 0.5 drawing units long. The linetype would be displayed as shown below.

__ . __ . __ . __ . __ . __ . __ . __

LIN files must be saved in the ASCII format and use a .lin file extension.

Linetype Name

The linetype name field must begin with an asterisk (*) and should provide a unique, descriptive name for the linetype.

Description

The description of the linetype should help you visualize the linetype when you edit the LIN file. The description is also displayed in the Linetype Manager and in the Load or Reload Linetypes dialog box.

The description is optional and can include

  • A simple representation of the linetype pattern using ASCII text
  • An expanded description of the linetype
  • A comment such as “Use this linetype for hidden lines”

If you omit the description, do not insert a comma after the linetype name. A description cannot exceed 47 characters.

Alignment Field (A)

The alignment field specifies the action for pattern alignment at the ends of individual lines, circles, and arcs. The program supports only A-type alignment, which guarantees that the endpoints of lines and arcs start and stop with a dash. You must specify A-type alignment by entering A in the alignment field.

Pattern Descriptors

Each pattern descriptor field specifies the length of segments making up the linetype, separated by commas (no spaces are allowed):

  • A positive decimal number denotes a pen-down (dash) segment of that length.
  • A negative decimal number denotes a pen-up (space) segment of that length.
  • A dash length of 0 draws a dot.

You can enter up to 12 dash-length specifications per linetype, provided they fit on one 80-character line in the LIN file. You need to include only one complete repetition of the linetype pattern defined by pattern descriptors. When the linetype is drawn, the application uses the first pattern descriptor for the starting and ending dashes. Between the starting and ending dashes, the pattern dash specifications are drawn sequentially, beginning with the second dash specification and restarting the pattern with the first dash specification when required.

A-type alignment requires that the first dash length be 0 or greater (a pen-down segment). The second dash length should be less than 0 if you need a pen-up segment and more than 0 if you are creating a continuous linetype. You must have at least two dash specifications for A-type alignment.

How to Add a Simple Linetype to an LIN File?

  1. Open an LIN file in a text editor that saves in ASCII format.
  2. Create a header line that includes an asterisk and a linetype pattern name. The name of the linetype pattern is limited to 31 characters.
    • *BORDER,Border
  3. (Optional) Include a description on the header line, follow the linetype pattern name with a comma and description text.
    • *BORDER,Border __ __ . __ __ . __ __ . __ __ . __ __ .
  4. Create a descriptor line that follows these rules:
    • All linetypes must begin with a dash.
    • Enter zeros for dots.
    • Enter negative real numbers for spaces. The value defines the length of the space in drawing units.
    • Enter positive real numbers for dashes. The value defines the length of the dash in drawing units.
    • Separate each dot, dash, or space value from the next with a comma.
    • Use a space between a dot and a dash.
    • A,.5,-.25,.5,-.25,0,-.25

How to Create a Simple Linetype From the Command Prompt?

  1. At the Command prompt, enter -linetype.
  2. Enter c and press Enter.
  3. Enter a name for the linetype and press Enter.The linetype name can include up to 255 characters. Linetype names can contain letters, digits, and the special characters dollar sign ($), hyphen (-), and underscore (_). Linetype names cannot include blank spaces.
  4. In the Create or Append Linetype File dialog box, select an existing LIN linetype file or enter a new file name in the File Name box. Click Save.If you select an existing file, the new linetype name is added to the file.
  5. (Optional) Enter text that describes the new linetype and press Enter.
  6. At the Enter Linetype Pattern prompt, specify the pattern for the tinetype and press Enter. Follow these guidelines:
    • All linetypes must begin with a dash.
    • Enter zeros for dots.
    • Enter negative real numbers for spaces. The value defines the length of the space in drawing units.
    • Enter positive real numbers for dashes. The value defines the length of the dash in drawing units.
    • Separate each dot, dash, or space value from the next with a comma.
    • Use a space between a dot and a dash.
  7. Press Enter to end the command.

Note: When you create a linetype, it is not loaded into your drawing automatically. Use the Load option of the -LINETYPE or the Load button in the Linetype Manager (LINETYPE command).

How to Add Text in a Custom Linetype?

Characters from text fonts can be included in linetypes. Linetype pattern descriptors that include embedded characters is similar to that for simple linetypes.

For example, a linetype called HOT_WATER_SUPPLY is defined as

*HOT_WATER_SUPPLY,---- HW ---- HW ---- HW ---- HW ---- HW ---- 
A,.5,-.2,["HW",STANDARD,S=.1,U=0.0,X=-0.1,Y=-.05],-.2

This indicates a repeating pattern starting with a dash 0.5 drawing units long, a space 0.2 drawing units long, the characters HW with some scale and placement parameters, and another space 0.2 drawing units long. The text characters come from the text font assigned to the STANDARD text style at a scale of 0.1, an upright rotation of 0 degrees, an X offset of -0.1, and a Y offset of -0.05. This pattern continues for the length of the line, ending with a dash 0.5 drawing units long. The linetype would be displayed as shown below.

Character Descriptor Format

The format for adding text characters in a linetype description is as follows:

["text_string",text_style_name,scale,rotation,xoffset,yoffset]

Scale, rotation, x-offset, and y-offset values must be expressed as signed decimal numbers such as 1, -17, and 0.01.

Text string

The characters to display in the linetype.

Text style name

The name of the text style to be used. If no text style is specified, the currently defined style is used.

Note: Embedded text characters are associated with a text style in the drawing. Any text styles associated with a linetype must exist in the drawing before you load the linetype.

Scale

The scale factor to be used for the text style relative to the scale of the linetype. The scale factor provided must be prefixed with S=, for example S=.5 indicates a scale factor of 0.5. The height of the text style is multiplied by the scale factor. If the height of the text style is 0, the value for S=value alone is used as the height.

Rotation

The rotation angle of the characters to be displayed in the linetype. The rotation angle must be prefixed with U=R=, or A=.

  • U= specifies upright or easy-to-read text.
  • R= specifies relative or tangential rotation with respect to the line.
  • A= specifies absolute rotation of the text with respect to the origin; that is, all text has the same rotation regardless of its position relative to the line.

The value can be appended with a

  • d for degrees (degrees is the default value)
  • r for radians
  • g for grads

If rotation is omitted, 0 relative rotation is used. Rotation is centered between the baseline and the nominal cap height.

Note: Drawings containing legacy linetypes that do not use the U (upright) rotation flag can be updated to the latest linetype definition by reloading the linetype from the LIN files. Custom linetypes can be updated by changing the R (rotation) flag to the U (upright) flag prior to reloading a linetype definition.X-offset

The shift of the text on the X axis of the linetype, which is along the line. The offset provided must be prefixed with X=, for example X=.1 indicates an offset of 0.1. If an offset is omitted or is 0, the text is elaborated with no offset. Use this field to control the distance between the text and the previous pen-up or pen-down stroke. This value is not scaled by the scale factor defined by S=value, but it is scaled to the linetype.Y-offset

The shift of the text in the Y axis of the linetype, which is at a 90-degree angle to the line. The offset provided must be prefixed with Y=, for example Y=.1 indicates an offset of 0.1. If an offset is omitted or is 0, the text is elaborated with no offset. Use this field to control the vertical alignment of the text with respect to the line. This value is not scaled by the scale factor defined by S=value, but it is scaled to the linetype.

How to Add Shapes in a Custom Linetype?

A complex linetype can contain embedded shapes that are saved in shape files. Complex linetypes can denote utilities, boundaries, contours, and so on.

As with simple linetypes, complex lines are dynamically drawn as the user specifies vertices. Shapes and text objects embedded in lines are always displayed completely; they are never trimmed.

Linetype pattern descriptors that include shape objects is similar to that for simple linetypes.

The syntax for shape object descriptors in a linetype description is as follows:

[shape_name,shape_filename] or [shape_name,shape_filename,transform]

The following linetype definition defines a linetype named CON1LINE that is composed of a repeating pattern of a line segment, a space, and the embedded shape CON1 from the ep.shx file. (Note that the ep.shx file must be in the support path for the following example to work properly.)

*CON1LINE, --- [CON1] --- [CON1] --- [CON1]
A,1.0,-0.25,[CON1,ep.shx],-1.0

Character Descriptor Format

The format for adding a shape to a linetype description is as follows:

[shape_name,shape_filename,scale,rotate,xoffset,yoffset]

Scale, rotation, x-offset, and y-offset values must be expressed as signed decimal numbers such as 1, -17, and 0.01.

Shape name

The name of the shape to be drawn. This field must be included. If it is omitted, the linetype definition fails. If shape_name does not exist in the specified shape file, the linetype is loaded and can be used but without the embedded shape.

Shape filename

The name of a compiled shape definition (SHX) file. If it is omitted, the linetype definition fails. If shape_filename is unqualified (that is, no path is specified), the support paths of the program are searched for the file. If shape_filename is fully qualified and not found at that location, the path is removed and the support paths of the program are searched for the file. If the file is not found, the linetype is loaded and can be used but without the embedded shape.

Scale

The scale factor to be used for the shape by which the shape’s internally defined scale is multiplied. The scale factor provided must be prefixed with S=, for example S=.5 indicates a scale factor of 0.5. If the shape’s internally defined scale is 0, the S= value alone is used as the scale.

Rotate

The rotation angle of the shape to be displayed in the linetype. The rotation angle must be prefixed with U=R=, or A=.

  • U= specifies upright or easy-to-read text.
  • R= specifies relative or tangential rotation with respect to the line.
  • A= specifies absolute rotation of the text with respect to the origin; that is, all text has the same rotation regardless of its position relative to the line.

Note: Drawings containing legacy linetypes that do not use the U (upright) rotation flag can be updated to the latest linetype definition by reloading the linetype from the LIN files. Custom linetypes can be updated by changing the R (rotation) flag to the U (upright) flag prior to reloading a linetype definition.

X-offset

The shift of the shape in the X axis of the linetype computed from the end of the linetype definition vertex. The offset provided must be prefixed with X=, for example X=.1 indicates an offset of 0.1. If an offset is omitted or is 0, the shape is elaborated with no offset. Include this field if you want a continuous line with shapes. This value is not scaled by the scale factor defined by S=value.

Y-offset

The shift of the shape in the Y axis of the linetype computed from the end of the linetype definition vertex. The offset provided must be prefixed with Y=, for example Y=.1 indicates an offset of 0.1. If an offset is omitted or is 0, the shape is elaborated with no offset. Include this field if you want a continuous line with shapes. This value is not scaled by the scale factor defined by S=value.

How to Load the Custom Linetype?

  1. Command line enter “Linetype”
  2. In the Linetype Manager dialog box, click Load.
  3. In the Load or Reload Linetypes dialog box, use one of the following methods:
    • Choose the linetypes to load.
    • Click File to open a linetype definition (LIN) file, and choose the linetypes to load.
  4. Click OK to close each dialog box.

How to Unload the Linetype?

In the Linetype Manager dialog box, choose the linetype, and click Delete.

These linetypes cannot be unloaded:

  • BYLAYER
  • BYBLOCK
  • CONTINUOUS
  • Linetypes currently in use

Note: Use the PURGE command to remove all unused linetypes from a drawing.

How to Set the Linetype Scale for New Objects?

The linetype scale controls the size and spacing of repetitions of the linetype pattern per drawing unit.

  1. In the Linetype Manager, click Show Details.
  2. Enter a new value for Current Object Scale.

How to Change the Linetype Scale of Selected Objects?

  1. Select the objects.
  2. Right-click in the drawing area, and choose Properties from the shortcut menu.
  3. In the Properties palette, click Linetype Scale and enter the new value.

How to Change the Linetype Scale for All Objects?

  1. In the Linetype Manager, click Show Details.
  2. Enter a new value for Global Scale Factor.

Note: The object’s current linetype scale is multiplied by the global scale factor to get the displayed linetype scale.

Read more

Scale in AutoCAD is important because it impacts how things are installed and built to code in the field. If your drawings aren’t scaled properly, miscommunication and other unfavorable results occur. It’s crucial to accurately scale your drawings, especially since many of the components and systems need to go into an actual building.

How to Scale All drawing objects to Change Unit

If you start a drawing in one system of measurement (imperial or metric) and then want to switch to the other system, use SCALE to resize the model geometry by the appropriate conversion factor to obtain correct distances and dimensions.

  1. Click Home tab > Modify panel > Scale. 
  2. At the Select Objects prompt, enter all.
  3. Enter a base point of *0,0.Scaling will be relative to the world coordinate system (WCS) origin and the location of the drawing origin will remain at the WCS origin.
  4. Enter the scale factor. To convert from inches to centimeters enter 2.54 (there are 2.54 centimeters per inch). Or, to convert from centimeters to inches enter 0.3937 (the inverse of 2.54 centimeters per inch).

See Also: How to Convert Drawing Units from Inches to Centimeters?

How to Scale Selected Objects in AutoCAD?

Scale Objects Using a Scale Factor

  1. Click Home tab>Modify panel>Scale. or Command line enter “SC” or “SCALE”
  2. Select the object to scale.
  3. Specify the base point.
  4. Enter the scale factor or drag and click to specify a new scale.

With SCALE, you can make an object uniformly larger or smaller. To scale an object, you specify a base point and a scale factor. Alternatively, you can specify a length to be used as a scale factor based on the current drawing units.

A scale factor greater than 1 enlarges the object. A scale factor between 0 and 1 shrinks the object.

Scaling changes the size of all dimensions of the selected object. A scale factor greater than 1 enlarges the object. A scale factor less than 1 shrinks the object.

Note: When you use the SCALE command with objects, the position or location of the object is scaled relative to the base point of the scale operation, but the size of the object is not changed.

Scale Objects Using a Reference Distance

You can also scale by reference. Scaling by reference uses an existing distance as a basis for the new size. To scale by reference, specify the current distance and then the new desired size. For example, if one side of an object is 4.8 units long and you want to expand it to 7.5 units, use 4.8 as the reference length.

  1. Click Home tab>Modify panel>Scale. 
  2. Select the object to scale.
  3. Select the base point.
  4. Enter r (Reference).
  5. Select the first and second reference points, or enter a value for the reference length.

You can use the Reference option to scale an entire drawing. For example, use this option when the original drawing units need to be changed. Select all objects in the drawing. Then use Reference to select two points and specify the intended distance. All the objects in the drawing are scaled accordingly.

About SCALE Command

To scale an object, specify a base point and a scale factor. The base point acts as the center of the scaling operation and remains stationary. A scale factor greater than 1 enlarges the object. A scale factor between 0 and 1 shrinks the object.

The following prompts are displayed.

Select objects

Specifies which objects you want to resize.

Base point

Specify a base point for the scale operation.

The base point you specify identifies the point that remains in the same location as the selected objects change size (and thus move away from the stationary base point).

Note: When you use the SCALE command with annotative objects, the position or location of the object is scaled relative to the base point of the scale operation, but the size of the object is not changed.

Scale Factor

Multiplies the dimensions of the selected objects by the specified scale. A scale factor greater than 1 enlarges the objects. A scale factor between 0 and 1 shrinks the objects. You can also drag the cursor to make the object larger or smaller.

Copy

Creates a copy of the selected objects for scaling.

Reference

Scales the selected objects based on a reference length and a specified new length.

How to Scale Dimensions in AutoCAD?

Dimension scale affects the size of the dimension geometry relative to the objects in the drawing. Dimension scale affects sizes, such as text height and arrowhead size, and offsets, such as the extension line origin offset.

You should set these sizes and offsets to values that represent their actual size on paper. Dimension scale does not apply the overall scale factor to tolerances or measured lengths, coordinates, or angles.

Note: You can use annotative scaling to control the overall scale of dimensions displayed in layout viewports. When you create annotative dimensions, they are scaled based on the current annotation scale setting and automatically displayed at the correct size.

How to Scale Text in AutoCAD?

A drawing may contain hundreds of text objects that need to be scaled, and it would be tedious to scale them individually. Use SCALETEXT to change the scale of one or more text objects such as text, multiline text, and attributes. You can specify a relative scale factor or an absolute text height, or you can scale selected text to match the height of existing text. Each text object is scaled using the same scale factor, and it maintains its current location.

How to Scale Hatch Pattern in AutoCAD?

  1. Select the hatch inside the rectangle.
  2. To change the scale: on the Properties panel, enter a specific scale or use the up and down arrows to set the scale.

How to Scale Raster images in AutoCAD?

You can control the size of a raster image in a drawing to match the scale of the drawing.

You can specify the raster image scale factor when you attach the image so that the scale of the geometry in the image matches the scale of the geometry in the drawing. The default image scale factor is 1, and the default unit for all images is “Unitless.” The image file can contain resolution information defining the dots per inch (DPI), relating to how the image was scanned.

If an image has resolution information, the program combines this information with the scale factor and the unit of measurement of the drawing to scale the image in your drawing. For example, if your raster image is a scanned blueprint on which the scale is 1 inch equals 50 feet, or 1:600, and your drawing is set up so that 1 unit represents 1 inch, then in the Image dialog box under Scale, select Specify On-Screen. To scale the image, you clear Specify On-Screen, and then enter 600 in Scale. The image is then attached at a scale that brings the geometry in the image into alignment with the geometry in the drawing.

If no resolution information is defined with the attached image file, the width of the raster image is set to one unit. Thus, when the image file is attached, the image width in units is equal to the raster image scale factor.

How to Scale Viewport in AutoCAD?

To scale each displayed view accurately for output, set the scale of each layout viewport.

When you work in a layout, the scale factor of a view in a layout viewport represents a ratio between the actual size of the model displayed in the viewport and the size of the layout. The ratio is determined by dividing the paper space units by the model space units. For example, for a quarter-scale drawing, the ratio would be a scale factor of one paper space unit to four model space units, or 1:4.

You can change the view scale of the viewport by using

  • The Properties palette
    • Select the layout viewport that you want to modify.
    • Right-click, and then choose Properties.
    • If necessary, click Display Locked and choose No.
    • In the Properties palette, select Standard Scale, and then select a new scale from the list.The scale you choose is applied to the viewport
  • The triangular scale grip in a selected viewport
    • Select the layout viewport that you want to modify.
    • Click the triangular scale grip near the center of the viewport, and click the desired scale from the list.
  • The Viewports Scale on the status bar
  • The XP option of the ZOOM command when model space is accessed from within a layout viewport

Note:

  • Scaling or stretching the layout viewport border does not change the scale of the view within the viewport.
  • When creating a new drawing based on a template, the scales in the template are used in the new drawing. The scales in the user profile are not imported.
  • You can modify the list of scales that are displayed in all view and plot scale lists with SCALELISTEDIT. After you add a new scale to the default scale list, you can use the Reset button in the Edit Drawing Scales dialog box to add the new scale to your drawing.

How to Scale Annotation Objects in AutoCAD?

Annotation scale is used to determine text height or the overall scale of an annotation object.

The approach used to calculate an annotation scale depends on whether the object is placed in model space or on a layout.

In Model Space

When annotation objects are created in model space, the following must be considered:

  • Drawing or plot scale if plotting from model space.
  • Viewport scale of a layout viewport if plotting from a paper space layout.

The text height or scale of an annotation object in model space can be set to a fixed text height or be controlled by assigning the object an annotation scale. Annotation objects assigned a fixed text height or object scale remain proportionate in size to the current plot or viewport scale.

If the annotative property of an annotation object is enabled, the text height or scale of the annotation object adjusts based on the current drawing annotation or layout viewport scale with the result that it will remain at the same size automatically.

Directly on a Layout

Annotation objects created in paper space on a layout should be created at full size because layouts are commonly plotted at a 1:1 scale. For example, text created with a height of 1/8” in paper space will be output at 1/8” unless a scale other than 1:1 is used to plot the layout.

How to Calculate the Scale of Annotation Objects in Model Space

If you print from model space, annotation objects must be scaled according to the scale of the intended output.

When calculating the scale for annotation objects for printing from model space, follow these guidelines:

  • Dimensions. Set the dimension scale factor to the inverse of the drawing scale. For example, if the intended scale is 1″ = 4′ (1:48 scale), set the dimension scale factor, DIMSCALE, to 48. Then, when the drawing is printed at 1:48 scale, the dimensions will be printed at the correct scale.
  • Text. Text height must be multiplied by the inverse of the intended scale. For 1/4″ text at a 1:48 scale, create the text with a height of 12″. The calculation is 1/4 x 48 = 12.
  • Linetypes. The linetype scale factor also needs to be changed based on the linetype definition and intended scale of the drawing. For example, if the intended scale is 1″ = 4′ (1:48 scale) and you want to use a dashed linetype that prints dashes that are 1/8″ in length, set the linetype scale factor, LTSCALE, to 12.
  • Hatches. Set the hatch scale based on the pattern used. Hatch patterns that start with AR commonly use the drawing scale factor as the appropriate value for the hatch scale.
  • Attributes and Tables. Use the same scaling as text objects.
  • Block Definitions. Blocks are usually created at a 1:1 scale. However, if they contain text or attributes they might need to be scaled using the same method as text.

How to Set the Plot Scale in AutoCAD?

When you specify a scale to output your drawing, you can choose from a list of real-world scales, enter your own scale, or select Fit to Paper to fit onto the selected paper size.

Usually, you draw objects at their actual size. That is, you decide how to interpret the size of a unit (an inch, a millimeter, a meter) and draw on a 1:1 scale. For example, if your unit of measurement is millimeters, then every unit in your drawing represents a millimeter. When you plot the drawing, you either specify a precise scale or fit the image to the paper.

Most final drawings are plotted at a precise scale. The method used to set the plot scale depends on whether you plot model space or a layout:

  • From model space, you can establish the scale in the Plot dialog box. This scale represents a ratio of plotted units to the world-size units you used to draw the model.
  • In a layout, you work with two scales. The first affects the overall layout of the drawing, which usually is scaled 1:1, based on the paper size. The second is the scale of the model itself, which is displayed in layout viewports. The scale in each of these viewports represents a ratio of the paper size to the size of the model in the viewport.

Set a Specific Scale

When you plot, the paper size you select determines the unit type, inches or millimeters. For example, if the paper size is in mm, entering 1 under mm and 10 under Units produces a plotted drawing in which each plotted millimeter represents 10 actual millimeters.

The illustrations show a light bulb plotted at three different scales.

Scale the Drawing to Fit the Page

When you review drafts, a precise scale is not always important. You can use the Fit to Paper option to plot the view at the largest possible size that fits the paper. The height or width of the drawing is fit to the corresponding height or width of the paper.

When you plot a perspective view from model space, the view is scaled to fit the paper even when you enter a scale.

When you select the Fit to Paper option, the text boxes change to reflect the ratio of plotted units to drawing units. This scale is updated whenever you change the paper size, plotter, plot origin, orientation, or size of the plotted area in the Plot dialog box.

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