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.

Promo Options
NumPad1: Unlimited Stored Water

Trainer Options
# Resources 
     NumPad1: Unlimited Stored Water

# Construction 
     NumPad2: Easy Construction
     NumPad3: Fast Build Structures

# Cheats 
     NumPad4: Unlock Cheat Menu and Options
     F10: F10 Open Cheat Window
     Shift+F2: SHIFT-F2 Add All Resources
     Shift+F3: SHIFT-F3 Add Colonist
     Shift+F4: SHIFT-F4 Add Specialist

Notes
DO NOT TRY TO TOGGLE CHEATS ON UNTIL YOU ARE IN AN ACTUAL GAME SESSION AND CAN SEE YOUR SURVIVORS AND RESOURCES!

Pobably best to delete the settings file for this trainer so the hotkeys are accurate after each patch and new trainer is released.

Unlimited Stored Water:
Toggle on and your stored water supply is always full.