B25001 - InstallationB2500 MFP User’s Guide16• Set envelope by pressing the folding line of four edges properly after releasing air inside.• Set envelope in a proper position after aligning in case it is bent or warped.Toner Cartridge installation1 Stand in front of the machine.2 Push the left and right sides of the cover and pull it at the same time towards you.3 Unpack the cartridge and hold it by its handle.4 Insert the cartridge in its slot by pushing it until it clicks (with a downward motion) as shown onthe picture below.5 Close the cover.