Hey, I see your frustration with the layout changes. The team is collecting all UI and layout feedback in this megathread: [Megathread] Cursor layout and UI feedback
There are already 290+ comments with similar complaints, including forced layout resets after updates and UI elements disappearing.
About the chat button specifically, it was intentionally removed in v2.3 in the Agent layout. Alternatives:
CTRL+ALT+Bto toggle the chat panelCTRL+Eto switch to the Editor layout, the button is there- The gear icon (top right) to set up a custom layout
I know this isn’t a replacement for the button you’re used to. Your feedback will really help if you leave it in the megathread, the team is watching it.