I think we may need a bit more information here. It sounds like you want one Canvas on top of another. If the reason you want that is to have a background, it is probably a waste of time to do so with two Canvas widgets.

Canvas widgets give you the ability to specify how objects are layered on them. Specifically you would assign a Tag to an item then use the $canvas->lower() and $canvas->raise() methods to control which are drawn on top.

But the easiest thing to do is draw your background first. Then you are done unless you accidentally lower another object below it.

Hope this helps - if not post some code and myself and other monks will be sure to take a look at it. Good luck,
{NULE}
--
http://www.nule.org