What this buttons do? Ive been using this MIDI keyboard for a while but I never use the buttons in all these time, what I can do with them?

https://i.reddituploads.com/2717b64dc1fd4c5cb44d04d8b1efe315?fit=max&h=1536&w=1536&s=35fa544e3e17f0b67d2ba9ff28416da6

Submitted December 12, 2016 at 03:56PM by ItsAlenn https://www.reddit.com/r/edmproduction/comments/5hyfjg/what_this_buttons_do_ive_been_using_this_midi/?utm_source=ifttt

Javier Rodriguez