Select the Glyph tab. This shows the glyphs that the
font supports.

Use the following API to programmaticaly alter a static font
(but remember that this only works if the font was designed
to support the feature):

FontFeature to select glyphs

FontWeight to modify weight

FontStyle to italicize

A FontFeature corresponds to an OpenType feature tag
and can be thought of as a boolean flag to enable or disable
a feature of a given font.
The following example is for CSS, but illustrates the concept:

Other resources

The following video shows you some of the capabilities
of Flutter’s typography and combines it with the Material
and Cupertino look and feel (depending on the platform
the app runs on), animation, and custom fragment shaders:

Prototyping beautiful designs with Flutter