Setting the scanner to a fixed page size

Hi forum,

when scanning with my All-in-One Printer Color Laserjet CM1312nfi MFP, the page size of the original in the paper feeder has to be set every time.

As I use DIN A4 size only (as normal in Germany) I would like to set the standard size to that value. How can I avoid to be forced to go through a list every time I'm scanning for selecting DIN A4?

Thanks for a hint.

Regards

AH_DE