Game menus - Options - Keyboard controls

Flip car: If the car falls onto the roof use this key to get back on wheels.

Use: Use interactive objects.

Machinegun, Rockets, Mortar: Switch weapons (if you have them).

Radar: Turn radar on and off.

Map: Turn moon map on and off. (only in campaign mode)

Objectives: Review objectives.

Default keys: Set default controls.