Often we need to edit a large diagram, without zooming out.
For example, I am creating an argument map from a Supreme Court verdict.
This diagram has grown beyond 120 nodes. Each node contains a statement that I must be able to read, so that I can draw edges between some of the nodes.
I cannot zoom out, because then the text becomes unreadable; and then I cannot choose the nodes between which to draw an edge.
Therefore, the best solution is to increase the canvas size.
But 40% of the screen area is blocked by the side panels.
So we need a command that toggles ALL the side panels on/off.
