Canon iR3245 Manual page 514

If you select an empty memory key (no settings have been stored):
Press [Yes], when the confirmation message appears asking you to store the
mode.
The memory key registering the copy mode is highlighted, and the registered settings are
displayed.
If you select an occupied memory key (settings have been stored):
Press [Yes], when the confirmation message appears asking you to overwrite
the mode.
7
The memory key registering the copy mode is highlighted, and the registered settings are
displayed.
4. Press [Done].
7-46 Storing Copy Settings