Set ROUND_XY_TO_GRID flag in Glyphs App?

Anyway to do this with a custom parameter?

Setting the ROUND_XY_TO_GRID bit in composite glyphs causes components to be shifted by an integer pixel amount which preserves a hinted shape. This reduces file size so that when I use ttfautohint it does not need to rehint composite glyphs to create consistent rendering – especially important for glyphs such as super-/sub-script numerals and fractions which use components that are shifted.

I’ll add that when I work on TrueType again, soon.

Thanks Georg!