Variable fonts

Variable fonts (also called OpenType fonts),
allow you to control pre-defined aspects of text styling.
Variable fonts support specific axes, such as width,
weight, slant (to name a few).
The user can select any value along the continuous axis
when specifying the type.

However, the font must first define what axes are available,
and that isn’t always easy to figure out. If you are using
a Google Font, you can learn what axes are available using
the type tester feature, described in the next section.

Using the Google Fonts type tester

The Google Fonts site offers both variable and static fonts.
Use the type tester to learn more about its variable fonts.

To investigate a variable Google font, go to the Google Fonts
website. Note that in the upper right corner of each font card,
it says either variable for a variable font, or
x styles indicating how many styles a static
font supports.

To see all variable fonts, check the Show only variable fonts
checkbox.