3D Camera:

F6 to turn on/off
F7 to reset position
Hold shift + right mouse button to rotate
Hold shift + mouse scroll to zoom in/out
F8 to show/hide UI
INSERT to enable camera position memory

Anti-Lag System:

[SHIFT + 1]: Hide Wings
[SHIFT + 2]: Reduce Skill Effect
[SHIFT + 3]: Reduce Item Effect
[SHIFT + 4]: Hide Ground Zen
[SHIFT + 5]: Hide Ground Item
[SHIFT + 6]: Hide Muun Pet
[SHIFT + 7]: Hide Chars and Shadows
[SHIFT + 8]: Hide Skill Effect
[SHIFT + 9]: Reduce Item Shine to +0
[SHIFT + 0]: Reduce terrain objects