Examine Mode (activate with key 'e'):

• Left Button / Left Button + Shift  ⇨  Rotate
• Mid Button / Left Button + Ctl  ⇨  Pan
• Right Button / Wheel / Left Button + Alt  ⇨  Zoom

Walk Mode (activate with key 'w'):

• Left Button  ⇨  Move forward
• Right Button  ⇨  Move backward

Fly Mode (activate with key 'f'):

• Left Button  ⇨  Move forward
• Right Button  ⇨  Move backward

Look at (activate with key 'l'):

• Left Button  ⇨  Move closer
• Right Button  ⇨  Move back

Non-interactive camera movement:

• r  ⇨  Reset view
• a  ⇨  Show all
• u  ⇨  Upright