Look up: PgUp
Bow your head: PgDn
Toggle mouse viewing angle control:/
Back to line of sight: end
Using binoculars: b
Zoom in: =
Enlarge:-
Switch walking/running status: uppercase lock
Speed up running: shift gears
Forward: w or up arrow key
Backward: s or down arrow key
Left: a
Right: d
Tilt to the left: Q.
Tilt to the right: e
The tilting action is still very useful in some corner positions.
Jump: space bar or right mouse button
Squat: c
Turn left: left arrow key
Turn right: right arrow key
Hold still: Alt press this key, the mouse will not be able to control the direction, and the line of sight will stay in the direction before pressing this key.