How to view pictures in full screen mode?

Hello

I convert pdfs to jpg and watch them on my android box.
It is too burdensome to zoom in and then go to the top of the picture and start reading to the bottom and then when I move to the next picture I have to do it once again.
Since I'm using a gamepad to control kodi it's even harder.
I know that there is a file called advancedsetting.xml and I have made it and started fiddling with it. But unfortunately I wasn't sucessfull at finding the right Parameter and value to get it to do what I want it to do.
Is there a code that helps me to achieve this?

Thank you