Command Reference \ Trackbar Commands
setTrackbarPosition | Sets the position of the trackbar slider.
setTrackbarRange | Sets the range of a trackbar slider.
setTrackbarTickFrequency | Sets the number of "ticks" or dividers which appear on the scale of the trackbar.
getTrackbarPosition | Gets the position of the trackbar slider.
getTrackbarMin | Gets the minimum value of the trackbar range.
getTrackbarMax | Gets the maximum value of the trackbar range.