Lock canvas to fit the screen width

Use case or problem

I want to build a single dashboard for all the projects I run – with checklists and references to specific notes that contain more detailed information. Everything laid out in a multicolumn, customisable fashion (a bit like xTiles boards).
Right now, creating such a dashboard with canvas in possible but scrolling in all directions makes it annoying to use. I am locked into a single column layout in a single note, and I would like to combine two worlds: flexibility of a canvas layout with enforced up-down scroll of a note.

Proposed solution

Adding an option that (a) will lock canvas to fit the window’s width exactly and (b) make it possible to scroll the canvas only up and down within the limits of elements laid out in canvas. Effectively turning canvas into an editable page.

Current workaround (optional)

Using HTML and CSS to create multiple columns layout in a note, which makes it impossible to use effectively in the edit mode.