Multilines are composed of parallel lines, called elements.

When you draw a multiline, you can use the STANDARD style, which has two elements, or specify a style that you created previously. You can also change the justification and scale of the multiline before you draw it.

Multiline justification determines which side of the cursor that the multiline is drawn, or whether it is centered on the cursor.

Multiline scale controls the overall width of the multiline using the current units. Multiline scale does not affect linetype scale. If you change the multiline scale, you might need to make equivalent changes to the linetype scale to prevent dots or dashes from being disproportionately sized.

Create Multiline Styles

You can create named styles for multilines to control the number of elements and the properties of each element. The properties of multilines include

  • The total number of elements and position of each element
  • The offset distance for each element from the middle of the multiline
  • The color and linetype of each element
  • The visibility of the lines, called joints, that appear at each vertex
  • The type of end caps that are used
  • The background fill color of the multiline

Elements with a positive offset appear on one side of the middle of the multiline; elements with a negative offset appear on the other side of the middle of the multiline.

How to Create a Multiline Style?

  1. At the command prompt, enter MLSTYLE.
  2. In the Multiline Style dialog box, click New.
  3. In the Create New Multiline Style dialog box, enter a name for the multiline style and select a multiline style from which to start. Click Continue.
  4. In the New Multiline Style dialog box, select the parameters for the multiline style and click OK.Descriptions are optional and can be up to 255 characters, including spaces.
  5. In the Multiline Style dialog box, click Save to save the multiline style to a file (the default is acad.mln). You can save multiline styles to the same file.If you create more than one multiline style, save the current style before creating a new one or you lose the changes to the first style.

How to Draw a Multiline?

  1. At the command prompt, enter MLINE. 
  2. At the Command prompt, enter st to select a style.
  3. To list available styles, enter the style name or enter ?.
  4. To justify the multiline, enter j and select top, zero, or bottom justification.
  5. To change the scale of the multiline, enter s and enter a new scale.Now draw the multiline.
  6. Specify the starting point.
  7. Specify a second point.
  8. Specify additional points or press Enter.If you specify three or more points, you can enter c to close the multiline.

How to Modify Multilines?

Edit a Multiline Style

Multiline styles control the number of line elements in a multiline and the color, linetype, lineweight, and offset of each element. You can also modify the display of joints, end caps, and background fill.

  1. At the Command prompt, enter MLSTYLE.
  2. In the Multiline Styles dialog box, select the style name from the list. Click Modify.
  3. Click Element Properties.
  4. In the Modify Multiline Styles dialog box, change the settings as needed.
  5. Click OK.
  6. In the Multiline Styles dialog box, click Save to save the changes to the style in the MLN file.

Delete a Vertex From a Multiline

  1. At the Command prompt, enter MLEDIT.
  2. In the Multiline Edit Tools dialog box, select Delete Vertex.
  3. In the drawing, specify the vertex to delete. Press Enter.

Create a Closed Cross Intersection

Multilines can intersect in a cross or a T shape, and the crosses or T shapes can be closed, open, or merged.

  1. At the Command prompt, enter MLEDIT.
  2. In the Multiline Edit Tools dialog box, select Closed Cross.
  3. Select the multiline for the foreground.
  4. Select the multiline for the background.The intersection is modified. You can continue selecting intersecting multilines to modify, or press Enter to end the command.

Use Common Editing Commands on Multilines

You can use most of the common editing commands on multilines except


To perform these operations, first use EXPLODE to replace the multiline object with separate line objects.


If you trim or extend a multiline object, only the first boundary object encountered determines the shape of the end of the multiline. A multiline cannot have a complex boundary at its endpoint.

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Great design in architecture and civil engineering starts with a floor plan.

What is a floor plan?

A floor plan is a technical drawing of a room, residence or commercial building, such as an office or restaurant. The drawing which can be represented in 2D or 3D, showcases the spatial relationship between rooms, spaces, and elements such as windows, doors, and furniture. Floor plans are critical for any architectural project. Architects, engineers and builders use floor plan software to create plans for their upcoming projects.

What is a floor plan used for?

A floor plan provides a preview of the architectural project. It shows how the space is divided and indicates the dimensions and measurements of the various elements such as window and doors. Those involved with the project will be able to suggest changes and move to the next stages, such as electrical, plumbing, structural, landscaping, and others.

The difference between blueprints and floor plans

Blueprints are detailed drawings referenced to build something. They can include many types of drawings and diagrams such as floor plans, elevations, and details. A floor plan shows a bird’s-eye view of the interior of structure including the location of walls, fixtures, and furniture.

Types of floor plans


A 3D floor plan is a view of an architectural space in three dimensions. By viewing a 3D floor plan one can get a better understanding of the size, layout, and proportions of a space.


Technical floor plans offer specific details and measurements showing the relationships between rooms and other spaces in an architectural or building engineering project. They’re drawn to scale and typically show only one level of a structure per drawing.


More realistic than other types of plans, humanized floor plans are best suited for presentation settings. In architecture and building engineering use cases, they show how an environment will look once the space is complete, including furniture, sinks, and other objects.

How to Create a simple floor plan in AutoCAD?


If you haven’t already, learn these commands before taking the tutorial:

  • Use Mline to create a double line using straight line segments and arcs. (In AutoCAD LT, using Dline)
  • Use rectang to create a rectangular polyline.

Draw external walls

  1. New drawing. In Start Drawing templates, click on the New button in the top toolbar and select the Tutorial i-Arch template.
  2. Mspace. In the new drawing, you start out in the paper space. Click Paper in the status bar at the bottom of the screen to switch the model space.
  3. Rectang. In the ribbon, click the Home tab. In the Draw panel, click Rectangle.  Specify the lower left and upper right points of the rectangle with your mouse to form the outside of the exterior wall.
  4. Offset. In the Modify panel, click Offset.  Specify 9″ by typing 9 and pressing Enter. Select the rectangle.
  5. Specify an inside point to create the other side of the wall. Then, hit Enter to escape the Offset command.

Draw internal walls

  1. There is no double-line tool on the ribbon, so enter MLINE and press Enter to start the command. (Mline in DWGSee CAD)
  2. Type w and press space for the Width option. Enter 4 to specify a width of 4″ for the interior walls.
  3. Right-click and select Osnap Overrides, then select Nearest.
  4. Click to specify a point on the inside rectangle of the wall on the East side.
  5. Click to specify a point inside the building.
  6. Right-click and select Osnap Overrides, then select Perpendicular.
  7. Click on the inside of the South outer wall. Press Enter to escape the dline command.

    Note: If you are following these steps in AutoCAD LT, use dline instead.

Draw a simple window

  1. Osnap. Click the small down arrow for the object snap menu in the status bar.  Click on MidpointNearest, and Perpendicular to enable these modes.
  2. Line. In the ribbon, click Line. Draw a small 9″ line through the outer wall on the East side.
  3. Copy. Select the line you just created. In the ribbon, click Copy.  For the base point, click on the selected line.
  4. Displacement. Move your mouse to specify a direction along the wall, but do not click. Type in 48 and press Enter.
    Glass pane. In the ribbon, click Line. Click to specify the Midpoint of one of the lines you created, then click to specify the Midpoint of the second line.
  5. Press Esc to stop the line command. Your simple window is complete.

Dimension the window

  1. Dimension. In the ribbon, in the Annotation pane, click Dimension. 
  2. Place the dimension. Specify both sides of the window by clicking on the outside edges with your mouse, then dragging away from the wall.
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