Hi Elaine and Greg,

Thank you very much for your fast answers! In fact, the idea Elaine suggested is the workaround I currently use. It works that way, but I think it is a bit fiddly to manually adjust the smaller labels and you have to create three labels every time instead of one, so I thought to give it a try to ask you all if there is a more elegant solution possible.

I was not aware that there are some non-number Unicode superscript and subscript characters, thanks for pointing out Greg! These will come in handy for simpler labels, but I think for more complex labels (like A_cis or B_trans) I have to stick to the above workaround.

Keep up the good work!

Sincerely

Leonard