Hi there,
In the latest Glyphs (Version 2.5b /1114) if you try to Paste Especial the spacing /sidebearings of a font into a another font with multiple masters, the information is copied to the lighter master and not to the (selected) bolder master.
It’s very bothering not to be able to copy/paste metrics in a reliable way. I always have to resort to generate the master as instance, import the metrics and then re import it to the multiple master file.
TIA.