Lift the PF up at the front until it clears the front of the cabinet and then slide it towards you until you hear two positive 'clicks' - it is now latched in a safe position.

Then you swing the PF vertically and over to rest on the backbox OR use the stay bar screwed to the inside of the cabinet into a hole provided in the underside of the PF.

To fold away - pull the PF back down to a 'just raised' position at the front and the catches release automatically and you can silde the PF backwards into the cabinet and then down at the front.