I don't have much comics so for testing purpose i just took some random ZIP manga and renamed it into CBR.
Not sure it was a good idea, as the pics show up in the wrong order and i couldn't find the logic of it. Oh well.
Y-"Line feed" - autoscroll down for a viewport height and move left (most comics have left-to-right reading order, aren't they ? and we had spare button :-))
The Y button makes the pictures scroll down but they stays
at the left side. The pictures I have here are huge for a Dingoo (1105x1600 hahaha), so i guess that has something to do with it ^^;
The "by pixel move" is impressively smooth, even if i'm not sure i will ever use it.
Anyway that's a pretty good job i'd say, very fast viewer, little file size, and easy to use
Now i'll try with a "real" CBR comic book file, should be easy to find (i think i had some but since i discovered that CBR are just ZIP files with different extension name, i renamed/unzipped them all... ^^; )