Mulitple Canvases in a Window?

With the app I'm working on, it makes sense from a design perspective to break the main window into 5 different (non-overlapping) canvases.

- Is this a MaxGUI no no?
- Any cross platform issues I need to worry about?
- Significant performance hit? It's an event driven business app but I still want it to be as responsive as possible...

Thanks for any help

David

- NP, just define 5 canvases.
- Not that *I* know of
- don't ye fear for only 5 canvases

Thank you!