This is also something I've been looking for, or at least similar to. I'd quite like to be able to put them in any order I choose, as currently the person I use least (one day a week) is at the top of the list as her name begins with A. Whilst my full timers and myself are at the bottom. Using the stacked option is ok, but I work on a 3 week rota which then looks too chaotic, and you can't tell who its been assigned to.