[RTN] - Return / Back - Short press [RTN] button to return to the previous page, previous menu or cancel action
[PAGE>] / [PAGE<] - Page next & page previous - Used to navigate between different screens, tabs, or options settings, depending on the screen.
[Roller] or [Dial] - Next & previous value The roller is used to navigate through menu options.
[Enter] - Accept - Used to select option, function or accept value - Push [Roller] or [Dial] button to select or enter.