Right, but what I'm trying do here is to put the contents of all the slides into one tiddler, in order, that I can then export as a pdf or copy and paste to html for my students.
I could just open each slide in order and then hit "print...". I can also do it manually by creating a tiddler with:
{{title of first slide}}
{{title of second slide}}
etc.
I was trying to be clever and use the list widget to generate this content automatically. The problem is that I don't what to sort by; the slides don't seem to have a count variable, at least not one that appears in the tiddler tags or fields.