b4 back brakes calipers

hi all changing pads in the morn are they push or twist back piston's
also will i need to bleed cheers
gearoid

i pushed mine back with quick grip clamp and i opened the resevoir. when i was finished i just put the lid back on and gave it a quick pump and was hunkey dory. depending on the lip on the disc ye might get away with removing the top bolt and only loosening the bottom and let the caliper hinge down. put a good dab of copper greese on as for some reason the squeek like mad if ye dont.

super m8 ty