A quick little tutorial
Font Awesome is a fontset frequently used on websites and also in apps. It contains a lot of graphics you can use in Kodular.
Font Awesome can be found here http://fontawesome.io/. If you want to download the font you get this:
press the the button at the bottom. You get a zip-file. Open it and go to the fonts folder.
Extract the file ending with .ttf and upload it to your makeroid app as an asset.
You can now use it in every component that has a
property.
Open it and choose the fontfile.
There is a very handy cheatsheet so you can choose the charater you want. http://fontawesome.io/cheatsheet/
Inside a button you can just type for instance 
inside the buttontext property and it will show the character. Inside a label you also have to check the HMTLformat property to make it work. The rest is the same.
In your app it could look something like this: