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
NumPad7: Unlimited Use Items

Trainer Options
# Player 
     NumPad1: Unlimited Health
     NumPad2: Unlimited Medicinal Pouch
     NumPad3: Unlimited Underwater Breathing
     NumPad4: Super Speed

# Team 
     NumPad5: Unlimited Party Health

# Map 
     NumPad6: Teleport To Waypoint

# Inventory 
     NumPad7: Unlimited Use Items
     NumPad8: Unlimited Arrows
     NumPad9: Unlimited Heavy Weapon Ammo
     Multiply: Easy Gather Items

# Enemies 
     Add: Ghost Hunter Mode
     Subtract: Silent Hunter
     Decimal: Invisible Hunter
     Divide: Weak Enemies

# Weapons 
     F1: Full Weapon Charge
     F2: Unlimited Concentration

# Crafting 
     F3: Easy Craft Items

# Buffs 
     F4: Unlimited Buffs

# Shop and Trade 
     F5: Sell Item Gives Metal Shards
     F6: Easy Buy

# Environment 
     F7: Always Daytime

# Missions 
     F8: Freeze Hunting Mission Timer

Editor Options
# Player Progression 
     Player Experience
     Player Level
     Skill Points Remaining

# Environment 
     Time of Day Hour
     Number of Days Playing

# Mission 
     Hunting Mission Timer
     Hunting Mission Timer Max

# Inventory 
     Max Weapons Capacity
     Max Outfits Capacity
     Max Modifications Capacity
     Max Resources Capacity

Notes
Unlimited Use Items:
Toggle on and most items when used it will not decrease.  Not this may affect some ammo items.  Some ammo this will multiply the amount fired as well.