Based on system:
Trim = CTRL/CMD and click on what you want to remove
Trim/Extend (called Adjust since it can do both) = CTRL/CMD and click on object or (draw a vector were you want to extend or trim to if no object is present)
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Menu under Edit -> Reshape
You can turn the "Edit Elements" Toolbar (under Window -> Toolbars) and you will have the icons
Eduardo Rolón AIA NCARB
AC27 US/INT -> AC08Macbook Pro M1 Max 64GB ram, OS X 10.XX latest
another Moderator