Am 10.01.2025 um 01:09 schrieb Hans Hagen :

def touchtolink (expr a, b) (text t) = label ("\framed[background=color,backgroundcolor=transparentwhite,align=normal,corner=00,frame=no]{" & t &"}", (a * xstep, b * ystep)); enddef ;

but you forgot to define:

\definecolor[transparentwhite][s=1,t=.5,a=1]

It seems I cut too many lines when making my example minimal. Thanks, this is exactly what I needed.

luametafun-mesh.tex might be interesting

It says it only works with Acrobat and it doesn’t work with preview. Greetings Axel