How to customize fonts in Gnome 3?

Question

Gnome

Hello.
OS: Ubuntu Gnome 15.10.
I would like to know how to customize fonts in gnome? In Gnome Tweaks, I set the required font, but it still looks a little different.
For example, I want to increase the font size here -

but I don't know in which file to change the settings.
Thank you.

Answer 1

Use the right utilities.
For example, here is a description of one of the most famous (albeit not the best, but it will suit you to solve the problem)