Change logo size

Problem/Motivation

I can not find a way to change the logo size. Why? There is something like font size configurable. But logo size is actually most essential!

See here: https://www.drupar.com/doc/edux/how-manage-website-logo

I didn´t find a way either to edit the following section: Limitless Learning And Get More Possibilities EduX Theme is packed full of all the amazing features and options for you to create an amazing education website.

This looks a bit strange to me. Can you enlighten me?

Sincerely,

Henning