Camera navigation

The ‚examine‘ mode gets activated by pressing ‚e‘. It contains the following functionality:
Button	Function
Left button (drag)	Rotate
Middle button / Left button + Ctrl (drag)	Pan
Right button / Left button + Alt (drag)	Zoom
Left button (double click)	Set center of rotation
The ‚walk‘ mode gets activated by pressing ‚w‘. It offers a wide-ranging rotation around the viewer.
Beyond that, there are a number of non-interactive camera movements, where a single key stroke triggers an immediate action:
Key	Function
r	Reset all
a	Show all
u	Upright
i	Center