My favorite feature about Zellij is the ability to have as many floating panes in arbitrary locations as desired. The way it works is that there are 2 "layers" of panes: the normal tiled panes, and a layer of floating panes that exists in front of the tiled panes. The floating layer can be toggled on and off, and the floating panes can be overlapping with each other. I have my ordered tiled panes that I work on normally, and then I can bring up my messy desktop of panes that I have lots of freedom in how I organize, more akin to an actual desk.

It's a bit silly, and certainly not necessary, but I like it a lot.