How to seamlessly unstow, disable stowing and disable the back button, and then re-enabling it later

Hey everyone

i was wondering if it was possible to Unstow the UIbar, then disable stowing and disable the back button, all within a single passage.

Then afterwards re-enable stowing and the back button as a feature in a new passage.

The reason i need this, is because i am making a combat system. It's nice to have the back button as a feature when navigating the story sequences of a twine story, but not so smart when in combat.

Unstowing is because i want health and such to be kept in the UI bar, and i want to make it very clear to the player that the bar is important during combat.

Thanks!