Currently, to revert back to an MSO not being visible after one or more of the states have been active, you have to create atop-level "blank" state that contains an empty frame of some sort, and show that state.

This seems like a workaround that should be built-in. Maybe a few new choices can be added to the "Show/Hide" options in a button's choices:

• Reset "X" MSO to invisible state
• Rest all MSO's to invisible state

...or something similar.

Thanks!!