In the ConTeXt reference manual in section 12.5 Cross references I find the following explanation:

[cid:DD84C63C-7615-45C8-8BC0-DA1B83459B42@dynamic.ziggo.nl]

I would like to set (interactive) references as the black triangles pointing forward and backward, as displayed here. Although I tried along the lines in the first example, as mentioned at the end of the text, I could not manage to get these triangles.

How to?

Hans van der Meer