You can create a part from an element that you select in the drawing area, either in the current project or in a linked model.
In the case of elements with layers or subcomponents, such as walls, individual parts will be created for those layers. For other elements, a single part element is created. In either case, the resultant part or parts can then be divided into smaller parts.
Note that project parameters and shared parameters and level data propagate to parts.
Select elements first
- In the drawing area, select the elements from which you want to create parts.
- Click Modify | <element type> tab
Create panel 
(Create Parts).
Select the tool first
- Click Modify tab Create panel (Create Parts).
- In the drawing area, select the elements from which you want to create parts.
Only elements that are eligible for part creation will be selectable when the tool is active; ineligible elements display in half-tone.
- Press Enter or the Spacebar to complete the action.