mobile

i know about the vol. down + pwr button combo. but, can anyone tell me:

1. how to get/add a screenshot tile in quick settings tile layout of cm-11.0?
2. app that lets action to be assigned to gestures or navbar buttons to take screenshot?

for e.g.: on my earlier device, i'd installed gravitybox xposed module. i was using 'double-tap back button' to take screenshots.

or, if there's a quicker and easier way of taking screenshots, please post about it. thanks.