Need to know location of TEXT Underline

[rwickramaRQLB3]

I am wondering is it possible to know how much the distance to this line? Pl. reply. Thanks.

[pendean]

You don't get to control that: sorry.

Create a 1-unit tall TEXT then try to measure it, then test with taller text.
Repeat if you change fonts.
Use your discovery as you wish.

That's it.