Overview
A simple and easy way of enabling and disabling of Boosters/Cheats that are explained what they do.
Boosters/Cheats!
Final Fantasy IX has been released on the steam network yesterday and along with the mobile devices there are 7 cheats or “boosters” as the game devs describe them.
You can head to config screen in your Menu to activate 3 of them: Master Abilities, Level/Mag stone Max, and Gil Max.
WARNING: Activating these is permanent! You can’t disable these in game so be wise on how you want to play the game!
But what about the other four boosters/cheats? Well you can’t find them in any menus.
Instead Pause the game (not the menu pause) which can be done by pressing Backspace on the keyboard or start on  a controller.
This can be done ANYTIME on the overworld or in battle so keep that in mind.
On the Pause Screen you can hit a few buttons to ACTIVATE or DEACTIVATE the other 4 boosters:
9999 Damage Toggle: Press F on the Keyboard or LT on the Controller. This makes every hit do 9999 Damage if it lands.
Full meters Toggle: Press G on the Keyboard or LB on the Controller. ATB and Trance meter is full during battle at all times. This also applies to the ablities bar for spells.
Fast Forward Toggle: Press H on the Keyboard or RB on the Controller. This puts the game into super speed making battle, moving around the overworld, conversation, etc. move at 10x the normal gameplay. 
NOTE: you can still get achievements while this is toggled on. Thank You DeXni for finding that out.
No Random Encounters: Press J on the Keyboard or RT on the Controller. This one explains itself.
Remember: all boosters can be enabled at once not just one at a time.
I hope this helps you guys with the game. Remember to have fun!