Vertical Kerning groups

Dear all, I’m drawing a vertical letter.

  1. Which of the vertical glip’s information [Height] begins with the [O] character at the top?
  2. Can I specify vertical Kerning groups in the font list?

I don’t understand.

This will be possible, soon.

I’m sorry I didn’t say it right. What I’m curious about is the name and role.
[T=Top], [B=Bottom] and [H=Height] in the bottom information panel. What is [O]?

O is Origin. It defines the top edge of the glyph box.

I appreciate your feedback!