We'd like to be able to have more fine control of the TIMERANGE macro, so you can say "%{TIMERANGE,FORMAT=$Y$m$d}" or "%{TIMERANGE,FORMAT=$o}" for the orbit number. Presently when you do a pngwalk with orbits, either orbit:foo:2 is displayed, which assumes that "orbit" and "foo" are understood to provide context for 2. It would be better to allow the context to be provided externally (figure caption) anyway.
Whoops, see also https://sourceforge.net/p/autoplot/feature-requests/426/
I was digging around and code and reverse engineering this feature, until I finally found this ticket. We really need documentation for this.