Vertical metrics for central text positioning
https://twitter.com/aaronbell/status/1598084126170812416
That's actually supported by the BASE table's centerline baseline already. Let me find it in CSS verbo.
https://www.w3.org/TR/css-inline-3/#central-baseline
Humm. Maybe not. IMO it should work though.
cc @jfkthame
I spoke to @dberlow today and he mentioned that the v metrics in OpenType are static font technology, and with a VF, across the design space, the v metrics are mostly inappropriate. Is MVAR a way to make different sets of metrics appropriate to eg each optical size, weight and width?
Adjusting v metrics across the designspace is one of the main reasons for the existence of MVAR. See this tweet for an animation of variable sxHeight and yStrikeoutPosition in Source Serif 4.
https://twitter.com/axis_praxis/status/1579469985130643456