I turn info-tips off in most programs, but Calibre is an exception, its info-tips are excellent, although they sometimes disappear too quick - some programs have a setting to specify the info-tip display time, maybe a tweak could be provided in Calibre.
However the Viewer Configuration screens don't seem to have any info-tips - I think they should have them, and at the same standard all the other calibre info-tips.
Or have a missed a setting
BR