Changing play modes in CDJ

Please tell me how I can go from shuffle playing the result of a search to an
all disc shuffle play. In other words, say I first shuffle played using kw=jazz results then later wanted to do a general shuffle play w/ all discs but even after deleting playlist and clearing search field only jazz tracks would be used I had to exit CDJ completely to change play modes. Is there a way to get back to
using the whole library for selections?

Secondly, is there a way to prevent power on my cd player from turning back on from slinke when I turn it off on the player?