Orbits the camera around the selected object
2D: Moves the map

Alt + Left Button:

Rotates the camera
2D: Tilts the map

Shift + Left Button:

Zooms-in or out

Shift + Right Button:

Changes the field of view
2D: No effect

Wheel:

Zooms-in or out

Double-click on object:

Travels to the object
(i.e. planetary body, spacecraft etc.)

Rolls the camera left or right
2D: Moves the map

Pitches the camera up or down
2D: Moves the map

'L''R'

Orbits the camera leftwards or rightwards around the selected object
2D: Moves the map

'U''D'

Orbits the camera upwards or downwards around the selected object
2D: Moves the map

'Shift' + 'L' or 'R'

Rotates the camera leftwards or rightwards
2D: No effect

'Shift' + 'U' or 'D'

Rotates the camera upwards or downwards
2D: No effect

'+''-'

Zooms-out or in