OTF underline is very very thick

Glyphs
1

Hi friends.

I use OTF free font family, but the underline words line is very very thick, I need it to be thinner.
How do I change the underline of a source in FontForge?

Thanks,
Er

2

This is the forum for Glyphs. We don’t know how to use fontforge. So we can’t help you.

3