How do you change ink in a Scantron machine?

To change the ink in a Scantron machine, first, ensure the machine is powered off and unplugged for safety. Open the ink cartridge compartment, typically located at the top or side of the machine, and gently remove the old ink cartridge. Insert the new ink cartridge, ensuring it clicks into place, then close the compartment. Finally, plug the machine back in and power it on to check that the ink is functioning properly.