From what I’ve heard, there are shortcuts that can be used in Roblox Studio to hide both “experience GUI” (CTRL+SHIFT+C) and CoreGui (CTRL+SHIFT+G), but I don’t believe I’ve had any luck with getting them to work there.
Outside of Studio, those shortcuts (and CTRL+SHIFT+B to hide BillboardGuis) work if you edit a specific flag to refer to a group that you’re in. If using Bloxstrap, it changes that to point to their group, and it works really well. I think this should just work for all players on computers without requiring them to be in any group, since it’s the only way (without exploits) to take clean screenshots and record videos (if the developer bothers to let the player use the freecam) of nice looking experiences.
Exactly. The whole right-side “MRU” menu should be able to be hidden by developers, moving all of the important menu items within it into the Roblox menu (and the chat button would return to its former, more logical positioning).