What to do to customize Canon printer?

Question

This Canon printer will reset itself and identify any issues that may prevent you from printing your documents. The settings you previously set are erased after you've finished the process of resetting. You can alter printing settings however you'd like. Take these actions to alter the settings of your printer. Reset canon printer mg3620 to make the most of your printing experience

Answer 1

Registering a Custom Paper Size
Display [Devices and Printers] from the [Control Panel] of Windows.
Right-click the icon of the printer you are using → click [Printing Preferences].
Click [Custom Paper Size] in the [Page Setup] tab. [Paper List]
Set [Paper Size to Register] and [Unit].
Click [Register] → [OK].

Greetings,
Peter