long ( canvas-set-scrollbars long canvas-id long x-unit-size long y-unit-size long x-length long y-length long x-page-length long y-page-length)
Set the scrollbars for the given canvas. The first argument pair specifies the number of pixels per logical scroll unit, that is, the number of pixels to scroll when a scroll arrow is clicked. If either is zero or less, that scrollbar will not appear. The second pair specifies the size of the virtual canvas in logical scroll units. The third pair of arguments specify the number of scroll units per page, that is, the amount to scroll by when the scrollbar is page-scrolled (usually by clicking either side of the scrollbar handle).