Images are just simple vertical lines a couple of pixels wide over the standard slider control.
I agree that the scale factor needs to be accounted for, but cannot see anywhere that the factor value is exposed by the canvas scaler.
My next attempt at solving this will be to try extend the scaler class itself to make the calibration images a part of the control at a lower level, but that’s going to have to wait till I have a bit more time.
I’m gearing up to start beta testing my first mobile game and that’s kinda taking up all my energy at time at the moment.
Thanks for the reply though.