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I am an older user, I have been a user for many years, and have been recently diagnosed with macular degeneration. I am now unable to easily find the slider in scroll bars in Calibre. I know it is a Qt issue. I have tried to find a way to be able increase the contrast or change the colour of the slider. No luck. Does anyone have a way to do this?

I tried to find a Qt forum, but was not successful.