CORSAIR UTILITY ENGINE
Since Corsair doesn't bundle a software CD with the K70 RGB you should visit their support page to download the latest version of their Utility Engine software.
The first thing this software will do once installed is to check and see if your keyboard has the latest firmware version installed and if not it will ask to update it.
From within the software you can assign actions to each of the 104 keys (macros, text, keystroke and others), adjust the color and effect (9 available ones) for the keys, set the keyboard lock button functionality, create your very own lighting effects, record macros and enable the OSD (on screen display) feature for when changing profiles and using one of the selected media players.
Here we've placed several of the available RGB effects one can use with the Corsair Utility Engine (you can always download more custom ones from the Corsair Gaming website).