Composite Solid

Merge 2 or more solids into a single, more complicated solid by Union, Subtract, Intersect Boolean operations

Boolean Operation

Union
Combine 2 or more 3D solids/ surfaces/ regions into a single composite solid/ surface/ region
Only same type of object can be combine

Subtract
Combine selected objects by Subtraction
Select 1st set of objects (keep), press Enter
Select 2nd set of objects (subtract), press Enter

Intersect
Create a solid/ region from selected overlapping objects

Modify Composite Solid by History

History must be record before the Boolean operation

The you can show the history

Solid tab > Primitive panel > Solid History

Ctrl + Select the subtracted object