Setting global font size in kivy

Question

What is the preferred way, whether through python or the kivy language, to set the global font size (i.e. for Buttons and Labels) in kivy?

What is a good way to dynamically change the global font size setting in proportion to the size of the window?

Answer 1

<Label>:
    font_size: dp(20)
    font_name: 'path/to/funcy/font.ttf'

Will set the font name and the font size globally for any widget that uses Label as it's base(TextInput and a few other widgets don't).