Make Part from Block PropertyManager
In assemblies, you can create parts from blocks in layout sketches.
To create a part from a block:
Click Make Part from Block (Layout Tools toolbar).
Select one or more blocks from a layout sketch.
Make selections in the PropertyManager as described below.
For each block, a part containing the selected block appears in the FeatureManager design tree. The part name is the same as the block name. Square brackets around the part name indicate that it is a virtual component. That is, it is saved within the assembly file, not in external files.
You can open the part to add features such as extrudes, fillets, etc., by right-clicking it and selecting Open Part (context toolbar).
Selected Blocks . Lists the blocks you select.
Block To Part Constraint
Project . Creates a part that is projected from the plane of the block in the layout sketch, but not constrained to be co-planar with it. In the assembly, you can drag the part in a direction normal to the plane of the block.
On Block . Constrains the part to be co-planar with the plane of the block in the layout sketch.
Layout-based assembly Design