Hi,
there is an information:
As of version 1.3.17, the mark and mkmk features are built automatically if there are combining marks with top and _top anchors present in the font.
But when I put “top” and “_top” anchors into a breveinvertedcomb mark it is always aligned to the left sidebearing of a glyph. How to center it, or rather how to align it with corresponding anchors of letters.
Should I put “_top” anchor into other letters that marks should combining with? I did try this but nothing changed.