Patterns - FLkey 37, 49 & 61 

This only applies to FLkey 37, 49 and 61. As Launchkey are a different product range, they don't provide the same level of integration with FL Studio.

Yes, that's possible. As you may know, when working in FLStudio pressing 'L' on your qwerty keyboard will switch between Pattern/Song mode. Using Components, you can assign this, and any other useful custom keystroke assignments, to FLkey button/pads of your choice and save them as a Custom Mode. You can check that out here - components.novationmusic.com/flkey/custom-modes/new