I started using Seamly recently and have enjoyed using it very much. There’s one issue which has made me a little frustrated, which is horizontal scrolling with a laptop trackpad doesn’t work. I’ve downloaded the source and made a simple fix, which I would like to contribute back to the repo. The github issues page states that a post should be made here first - so here I am!
The problem: there is a shift key modifier set up to scroll horizontally, which would work great when using a mouse with a wheel, but it conflicts with normal horizontal scrolling using a trackpad (and I assume would also conflict when using a horizontal scroll wheel on a mouse that has one). My fix moves this functionality to a new but nearly identical function to the existing vertical and horizontal ones, rather than taking the place of the horizontal one, which allows the normal horizontal scrolling to take place.