Hi,
Most PDF viewer software on M$ Win can scroll sideways with the Shift key pressed. How do you make Okular scroll sideways with the mouse wheel? Most of my work requires reviewing construction drawings, which have many details on A0-size pages. Please!
Alt+Wheel works for me. Plasma 5.27.5, Qt 5.15.8, Okular 22.12.3.
Is it possible you have overridden the default shortcuts, or something is interfering with them?
Do you have an unusual mouse wheel, like one that rolls freely instead of in steps, or a touchpad-simulated one?
Maybe you’ve discovered a Plasma 6 bug?