Canon MF6180dw Manual page 475

Press [ ] (Menu) to close the menu screen.
PDF (Compact) Image Level
Select the image level when PDF (Compact) is selected as the file format.
1
Press [ ] (Menu).
2
Select <Scan Settings> using [
3
Select <Output File Image Settings> using [
4
Select <PDF (Compact) Image Level> using [
5
Select the set mode using [
] or [ ] and press [OK].
] or [
] or [
] or [ ] and press [OK].
] and press [OK].
] and press [OK].