I would like to competely hide the two rest panes.
Pressing Ctrl+Shift+3 I can expand Help and other panes in any moment. But they restore minimized 3rd and 4th panes to the state in the screenshot above.
Do you know how to do it?
Yeah, that' a toggle, sorry to have misapprehended. I'd keep it at two panes and have a second session open with the two right panes and tab cycle or equivalent on your OS