Thanks clacke,

I have used 'entr' in the past, actually to refresh my note-viewing browser when the notes change. I now use Qupzilla because it does that all by itself, which is very cool!

I will think about using 'entr' or 'watch' in future, but for HPR shownotes I have several 'make' targets, so I'm not sure if I want to automate them all.

For example I use 'make final' to generate notes with HPR links rather than the local ones I use while developing them, and I can only do that once I have chosen a slot and know what the HPR links will be. Of course, I could trigger the 'make final' once the slot has been selected. 

Anyway, thanks for the idea :-)