At times (and in some diagrams, quite commonly) I want to put a note over all participants. This is done by using `note over A, B, C`, making sure to include all participants on the list (or, at least the first and last one...).
I suggest the following new syntax that will do the same:
This will paint a note over all participants, as if all of them were on the list. Alternative to `across` might be `over-all`.
Thank you for an awesome tool!