The easiest way to do this now is via a pagbuilder plugin such as our page builder for Canvas :)
Here’s the link to our page builder http://jamiemarsland.wpengine.com/shop/page-builder-for-woothemes-canvas/.
This is specifically designed to work on Canvas.
It’s based on this free pagebuilder https://wordpress.org/plugins/siteorigin-panels/ but we’ve added some extra’s in there :)
Let me know if that makes sense,