When the first weldment feature is inserted in a part,
Cut list 
appears in the FeatureManager design tree. As you create entities (structural members, gussets, extrudes, etc.), they are added to the
Cut list folder.
Identical items are grouped together in
Cut-List-Item subfolders, for later use in a cut list table on the weldment drawing.
If you see the icon
, the cut list needs to be updated. The icon
indicates that the cut list is up-to-date.
The number following the Cut list indicates how many entities are in the folder.