NOTE: In this example you will see how to add keyboard shortcuts for submenus in a menu bar.

Keyboard shorcuts

Shift + 1: First element (Communication)
Shift + 2: Second element (Shopping)
Shift + 3: Third element (Entertainment)
Shift + 4: Fourth element (Information)

Other shorcuts

Click here to select the Third element

Ctrl + Alt + P: Select the PIM submenu inside the First element (Communication -> PIM)