Hide all, guess all button

Is your feature request related to a problem? Please describe.
I create a lot of IO cards on ankidroid, where I often use the “hide all and guess all” type of card, there is no button to do it in one go.

Describe the solution you’d like
A button that makes all the masks active.

Describe alternatives you’ve considered
I use the selection tool to select all masks and press the combine button, so it’s good alternative but messy…!