Answers for "how to add font family to flutter"

flutter add custom fonts

flutter:
  fonts:
    - family: Proxima
      fonts:
        - asset: lib/fonts/ProximaNova-Regular.otf

In case you are using an emulator, go to the terminal and type "flutter clean" then "flutter pub get" to update the font used.

flutter text default font family

Text(
	'Text',
	fontFamily: 'Hind',
    fontSize: 20,
    fontWeight: FontWeight.w500),
)