All types of building object marks allow you to add user-defined attributes and template attributes. For example, you might want to add control numbers or specify the number of characters in part numbers in assembly or part marks.

1. On the Drawings & reports tab, click Drawing properties and select the drawing type.
2. Load drawing properties that are as close to the ones you need as possible.
3. Single-part, assembly and cast unit drawings: Click View creation in the options tree on the left, select the view and the properties that you want to change, and click View properties.
4. Click Part mark.
5. In the mark properties dialog box, double-click the User-defined attribute element in the Available elements list to add it in the mark.
   You can use the same element for adding template attributes.
6. Enter the user-defined attribute name in the Mark content - user defined attribute dialog box exactly as it appears in the objects.inp file.

   Note that you need to write ASSEMBLY. or CAST_UNIT. in the beginning depending on the material. For example, ASSEMBLY.USERDEFINED.ACN or CAST_UNIT.USERDEFINED.ACN.

7. Single-part, assembly and cast unit drawings: Click Save to save the changes in view properties and Close to return to drawing properties.

   General arrangement drawings: Click OK.

8. Click Save to save the drawing properties, then click OK and create the drawing.