Canon MF8230Cn auto print A5 using Manual feed slot and A4 using paper drawer

[Johnsmith34]

Hello,

How can I setup my Canon MF8230Cn so it auto print A5 documents using the Manual feed slot and A4 documents using the paper drawer ?
The Manual feed slot is already configured to A5
And the paper drawer to A4.

When I print A4 documents it automatically use the paper drawer, but for A5 in the Manual feed slot, I have to select in the screen of the printer which to use: Manual feed slot or Paper drawer.

Thank you.