thank you for your help. The marker works great now. The extra editable hotspots are acceptable.
Just to be clear, having the same number of editable hotspots at the ELSE end makes the first two work, even if they control different parameters. Is that correct?
I am thinking of adding a rotating hotspot at the center of the marker line to toggle the Flip parameter. If I do that will I will need another dummy hotspot at the ELSE end?
Thanks again, cheers.