The Quick Fire XTi piles on most of the controls as FN enabled keys: F1-2 controls the various brightness of the blue/red LEDs thus creating difference colours between them. F3 changes the lighting mode, from off, reactive, breathing, wave, ripple snake. F4 toggles the Windows key lock. Just a note about the Windows key function in W10, if you haven't checked out some of the functions of the Windows game bar yet, you may be surprised to find that it has easy in-game capture and screen shots (its list of features will likely grow). Still, it can be slightly annoying to have to have it enabled to use its features when an errant finger could drop you out of game. On-the-fly lock/unlock like this becomes a much more attractive option than having to open up software to do it. F5-8 change the repeat speed of the keyboard, allowing for x8 over USB 2.0, not a mode for the faint hearted.
More FN keys include the use of F9 as the macro record button, F10 macro delete, F11 'one time' playback, F12, toggle, prt sc as loop. Scroll lock and pause are for recording custom LED layouts. Further FN keys found are a complete set of media keys.
At the top right part of the keyboard you will find the 4 profile buttons for easy profile switching.
The keycaps feel decent quality, not too thin and not too thick and have a durable, UV coating. Underneath we find the Cherry MX Brown switches.
Flipping the keyboard over we find the well where the detachable cable is plugged into as well as some routing channels. People may be pleased to find that this keyboard uses micro USB rather than mini USB, the latter of which is known to wear quite quickly.