Right click should work e.g. in the Asset folder view for creating and editing Assets and folders. I don't know where else that would be necessary.
By default there should actually be shortcuts with alt+letter for some menus like File
, Edit
, Window
and Help
.
On creating your own menu items you can also define custom shortcuts for them:
To create a hotkey you can use the following special characters: % (ctrl on Windows, cmd on macOS), # (shift), & (alt). If no special modifier key combinations are required the key can be given after an underscore. For example to create a menu with hotkey shift-alt-g use "MyMenu/Do Something #&g". To create a menu with hotkey g and no key modifiers pressed use "MyMenu/Do Something _g".
Some special keyboard keys are supported as hotkeys, for example "#LEFT" would map to shift-left. The keys supported like this are: LEFT, RIGHT, UP, DOWN, F1 .. F12, HOME, END, PGUP, PGDN.
A hotkey text must be preceded with a space character ("MyMenu/Do_g" won't be interpreted as hotkey, while "MyMenu/Do _g" will).