Currently we can create a reading list and set it to 'manual' where we can manually type in our progress. I use this for any novels that aren't on NU or if I've made the ill-advised decision to read the MTL ;-; But typing in my progress is a bit of pain (yeah, I'm lazy af) so it would be really cool if there were a simple increment button that just checked for "c100" and bumped it to "c101" etc. This would only work for plain chapter counts and not volumes, obviously.