Overshoot in vertical metrics

Glyphs
1

Hi there.

I’m new in Glyphs and I want ask you about the overshoot of the vertical metrics. In a .otf that I import from Fontlab the glyphs has an overshoot on descender but not on ascender.
Can you help me to set this overshoot in both sides?

Apreciated,

Sebastian

2

See 7.2.4 from Glyphs Handbook v.2

3

You’re right, I did’nt remember the handbook. Thank you! c: