I hope it is OK.
Open your PDF manual.
Make screenshots of some pages of the manual.
Open one of them in Window painter. Don’t use Photoshop!
Select all and copy.
Open some of jpeg images taken by your camera and paste into it.
Now you have your PDF pages right on your camera’s screen.
|Nectar Dancing by Lensmate|
from A Big Year - birds
|Sad clown by PEB|
|Mtl Gen X 2015 DP by MarioSS|
from - Gen X - (In Full Colours+ Border)