How to hide top and side menus

Tell me how can I hide the red menus, leaving only the green area?

Hello,

There's no officially supported way to do what you're looking to do here. Having said that, there's nothing stopping you from inspecting the css and overriding these page elements to be hidden. Assuming you want to go that route, if you look around on this discuss forum, you should be able to find a few examples.

Regards,
Aaron