Rolf Niepraschk

Thank you for the answer. `font+` is a good idea.

The following example shows the problem. The circles are not mirrored. A more complex case is my package `blowup` which can resize all pages of a document. There I use...

Yes, Ulrike describes the cause correctly. However, the problem remains that different engines deliver different results.

Allow me to remind you again of the useful upload to CTAN. If necessary, I could help with that. Thanks in advance.

Hello Pedro, it is very easy to put packages on CTAN. Just fill out the form here https://www.ctan.org/upload Pack all files into an archive file (.zip or .tar.gz) and click...