Install a cartidge, easy open top cover, cartridges will automatically move to the centre, unclip desired cartridge and replace. Go to your Lexmark print centre and under maintenance advise it you have replaced the cartridge. If you meant how do i refill my cartridge, go to your local ink supplier calidad, ink man etc, purchase and follow the instruction book exactly as shown with the refill. This stuff stains whatever it touches.
Printer Guru, March 2007
