The left button is used to navigate up in the menu, the right button to navigate down, and both buttons simultaneously to “confirm” or “go back”.

Most of the time, a “double button press” is prompted by two horizontal lines at the top of the Ledger screen. And in a menu, a “double button press” will either confirm the selected-menu option, or take you back to the previous menu.

What button(s) to press and when should be intuitive.