Activating this trainer

If not state otherwise below, press F1 at main menu.
Listen for 'Trainer Activated'.
Press desired hotkey. All hotkeys can be changed on the trainer.

Trainer Options

# Gameplay 
     NumPad1: Game Speed
     NumPad2: Change Player Speed
     NumPad3: Change Player Walk Speed
     NumPad4: Change Player Sprint Speed
     NumPad5: Change Player Fly Speed

# Player 
     NumPad6: Invulnerable 
     NumPad7: Unlimited Health

# Ability 
     NumPad8: Unlimited CAT Battery
     NumPad9: Fly
     Multiply: No Clip While Flying
     Add: Float Player Higher While Flying
     Separator: Float Player Lower While Flying

# Position 
     Subtract: Save Position Slot 1
     Decimal: Save Position Slot 2
     Divide: Save Position Slot 3
     F1: Save Position Slot 4
     F2: Save Position Slot 5
     F3: Restore Position Slot 1
     F4: Restore Position Slot 2
     F5: Restore Position Slot 3
     F6: Restore Position Slot 4
     F7: Restore Position Slot 5

Notes

No Clip While Flying:
Enabling this option might have some adverse effects so use it only when you need to then disable it.