My apologies if this has been asked before but how do you hide geometry in ZB4? In version 3.5R3 you would hold down Cntrl + Shift and then release Shift while dragging in order to hide the selected portions of an object. That doesn’t seem to work in ZB4. Please help!! 
Don’t let go of shift, just hold ctrl+shift and drag out the box and everything outside of it disappears.
Hold down Cntr/Shift. Drag box. Let go off Cntl/Shift and press Alt key.
Red box will come up to hide geometry.