.so draw-scroll
Configuring scrollbars
\c{
The actual construction and geometrical layout
of the tablet widget involves the creation
of a canvas and two scrollbars.
As expected, the path of the canvas corresponds
with the path given to redirect.
The 3D appearance of the canvas is then determined
and its screen geometry and region of scrollable
surface is set (a).
Scrollbars are by default vertically oriented.
A horizontal orientation must be explicitly indicated (b).
The order of packing the scrollbars
and canvas is important.
Finally, the scrollbars must be attached
to the canvas (c).
}