Possibility to arrange slides on a grid as in reveal.js

Sequential arrangement of slides Right now the slides are simply arranged sequentially

Slides arranged on a grid It would be nice to have slides arranged on a grid, as implemented in reveal.js. It would be very useful when teaching classes. With slides on a grid, the first slide of a column would be the one with the teaching content, and the ones below could be used as a virtual whiteboard.

Possible alternative A possible alternative would be to have a whiteboard plugin. With the possibility to pull up a whiteboard associated with each slides.