Unused line button programming?

I am using the latest AsteriskNow with Digium phones and was wondering if I can program an unused line button to something other than a quick dial. In particular, a quick way to set/clear DND.

I’ve read a bit on BLF, but never seen reference to that particular function and given the other forum topic, is it possible with FreePBX?

Look up “generate device hints” in the wiki

FreePBX creates hints to control BLF for most system state functions.