Change Site Title & Tagline Font

Hi! I want to do the same. I’m using a mantra child theme. The first time I installed Mantra, I was able to load a picture into the headline. the picture is still in my site files. Unfortunately, I had issues with the theme which made me remove it, and now, when I try to reinsert the picture, it does not let me. It asks me to crop it no matter how small is the size I make it, keep asking me to crop it. Can someone help me?

@Mr Shuttle:
If it’s the first time you install Mantra and you want to display a picture in the headline, just go into the Mantra Seettings>Header first. There you can choose if you want to change the Tittle and tag line information or want to add custom logo, clickable header or leave it empty. This is done by choosing in the drop down menu that says Site Tittle and description. If you want an image bigger than 800×250 px then choose empty and save. Choose header under Mantra Settings and insert your image there. It acepts only certain sizes so be careful to choose the right size or adjust your image size to fit the space.
Is you are in need to change the Site’s name and desciption, this is done trough WordPress by going into customize and in the left side choosing the Site and Tittle tab. There you can insert your new site and title site. Please mr Shuttle, do not close this ticket so they can help me with my issue which is a little more complicated.

Following. I’ve got the same problem as HackDefendr. Putting Google font in box but nothing happens! Also my title is all upper case and I’d like to use both upper and lower. Help would be greatly appreciated!

Apologies Zed, just realised you replied to my question. Never got any notification of it!
I am using a google font called Raleway. I just want to be able to make the font bigger for the title and tagline and also use lower case. How do I do that? Thanks