Kensington expert mouse trackball

I have purchased a kensington expert mouse trackball and I am using it with fedora 39 ( was 38 yesterday - just upgraded) running wayland.

I like its precision and like that I can use it left or right handed, but I am struggling with horizontal scrolling when in my IDE.

I am used to OSX (just jumped ship) and I could just use the trackpad or the magic mouse, but I want to move away from a mouse to give my shoulder issue a rest.

Is there a way to configure the trackball to maybe hold down a key on the keyboard or a button on the trackball whilst rolling the ball to scroll or something like that.

Or is there a way to use the keyboard to control the horizontal scrollbar directly ?