Jupiter moons:
An approximation of the 'inner moons' of Jupiter.
Gravel simulations always run in full screen mode.
The centre of view can be moved by pressing the arrow keys on the NumPad (NumLock must be off) , and can be zoomed in and out by pressing '+' or '-' on the NumPad. The current zoom factor is display on the right-hand side of the statusbar. At a zoom factor of 1.0, each pixel represents one square meter.
The view can also be locked on any object such that the object will always be at the centre of the screen. Pressing the '*' key on the NumPad will lock the view and pressing '/' on the NumPad will unlock the view. When the view is locked, an indicator lights up on the right-hand side of the status bar.
Which object is to be centred can be changed by pressing PgUp and PgDown on the NumPad.