I have a question about non-spacing combining marks. I know Glyphs will zero-width combining marks at export by moving the LSB to the RSB. If I do it myself I can choose to set the center position of the glyph to where I want it to be.
My question is: is it good practice to to set the center at where the mark anchor is? Or is it better to give the marks LSB and RSB of 0 and let Glyphs do it at export? Or something else completely?
There is no really good practice. Putting them to the left (like Glyphs is doing it right now) will have then in a roughly correct place when mark positioning fails. But that is not really a problem any more.