You can find any tool by the Menu Structure HERE: https://turbocaddoc.atlassian.net/wiki/display/TC21UG/Menu+Structure

You can find the menu location of any tool by name HERE: https://turbocaddoc.atlassian.net/wiki/display/TC21UG/Tools+Mapped+to+Menus

2D Subtract

 
Subtracts one or more objects from one or more objects, to form one region.

  1. Select one or more objects to subtract area from.
  2. Select FinishSelecting from the local menu or Inspector Bar.
  3. Select one or more objects to subtract from the previously selected objects.
  4. Select Finish from the local menu or Inspector Bar. The second group of objects is removed from the first group.

    The resulting object is one region. You can verify this by selecting the region.