Creating a Custom Column Using Molding Polylines


Reference Number: KB-02791
Last Modified: November 5, 2026

QUESTION

I have searched through the Millwork items that include columns in the Library Browser and have determined that none of the options will suit my needs. How can I create a completely custom column?   


ANSWER

Custom columns can easily be made by creating a molding profile and applying it to the outside edge of a molding polyline. Use the CAD tools to create a custom molding profile that is the actual height of the column you wish to create and half the width minus 1/2" (the molding will be applied around a 1" square or circle). See the "Creating and Editing Molding Profiles" resource in the Related Articles section for more information on creating a custom molding profile and adding it to your library.

For this example, the following molding profile shape is used:

Custom profile that has been created using CAD


Using a molding profile to create a column

  1. While in plan view, select CAD> Boxes> Rectangular Polyline  from the menu.

    Using a CAD circle instead of a square will result in a round column.


  2. Click and drag to create a 1" square. Use dimensions to resize the square if necessary.

    1" x 1" Rectangular Polyline created


  3. Using the Select Objects tool, select the square and then click the Convert Polyline  edit tool.


  4. In the Convert Polyline dialog that appears, choose the Molding Polyline option, specify the Layer Options to your liking, then click OK.

    Select the Molding Polyline option in the Convert Polyline dialog


  5. In the Molding Polyline Specification dialog which opens next, select the Moldings panel.


  6. Click the Add New or Replace button and browse to the custom molding profile that you created, which should be located in the User Catalog.

    Adding the custom molding profile to Molding Polyline

    • Notice that the Height and Width match what was used when the profile was created. You can also change these values here if you'd like.

    • Set the Horizontal Position to Outside Polyline.

      In X17 and prior, remove the check from the Extrude Inside Polyline box instead.
     

  7. Select the Materials panel and specify your desired material for the column.


  8. Click OK to confirm the changes and take a Camera view to see the results.

    Camera view of a custum column


To add the column to your user catalog

  1. Select  your column, then click on the Convert to Symbol  edit tool.


  2. In the Convert To Symbol dialog:

    • Specify the Symbol Name.

    • Set the Symbol Category to Millwork. Specifying this as millwork will allow you to use it as a post for your railing. 

    • Ensure Add to Library is checked and click OK.


  3. The column can now be found in your User Catalog when accessing the Library Browser .