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

# Player 
     NumPad1: Invulnerable 
     NumPad2: Unlimited Health
     NumPad3: No Thirst
     NumPad4: No Hunger
     NumPad5: Unlimited Oxygen
     NumPad6: Super Damage
     NumPad7: Fly
     NumPad8: No Clip
     NumPad9: Hover Player Higher
     Multiply: Hover Player Lower
     Add: Change Player Speed
     Separator: Increase Player Speed
     Subtract: Decrease Player Speed
     Decimal: Set Normal Player Speed
     Divide: Change Player Jump
     F1: Increase Jump Height
     F2: Decrease Jump Height
     F3: Set Normal Jump Height
     F4: Change Player Gravity
     F5: Decrease Gravity
     F6: Increase Gravity
     F7: Set Normal Gravity

# NPC  
     F8: Change NPC Speed
     F9: Decrease NPC Speed
     F10: Increase NPC Speed
     F11: Freeze NPC
     F12: Set Normal NPC Speed

# Teleport 
     F13: Save Position Slot 1
     F14: Save Position Slot 2
     F15: Save Position Slot 3
     F16: Save Position Slot 4
     F17: Save Position Slot 5
     F18: Restore Position Slot 1
     F19: Restore Position Slot 2
     F20: Restore Position Slot 3
     F21: Restore Position Slot 4
     F22: Restore Position Slot 5

# Game  
     F23: Game Speed

Notes

No Clip:
It won't work without Fly.