Why are the Tool Settings so different between the Clip Volume and Clip Mask tools?
In the Clip Mask Tool Settings the Show/Hide and Delete options are in the Tool Settings dialog which is very convenient. for the Clip Volume tool you have to go to a separate tool box to get to the Show/Hide and Delete options.
Please change the interface on Clip Volume Tools to match Clip Mask.
And the button "Clip Volume" in the View Attributes should be named as "Clip Volume / Clip Masks" because is for both.