I'm a PowerApps rookie and I've searched through previous replies to this but can't seem to find anything that fixes my problem. I have a gallery in screen one with an edit button with onSelect set to
UpdateContext({TEST: true})
In another Label inside the gallery and a Label outside of the Gallery I have Text set to
TEST
I'm just trying to test to make sure the edit button is working. When I try it out I can never get a change. What am I missing?

Thank you in advance.