Installing these fonts

  macOS    Select all .ttf files, double-click, then Install Font.
  Windows  Select all .ttf files, right-click, then Install for all users.

Open Sans ExtraBold and Open Sans SemiBold install as their own font families
rather than as weights of "Open Sans". That is how the Google Fonts releases
behave and it is what Word and PowerPoint expect. Headlines in the brand
templates ask for "Open Sans ExtraBold" by name.

These are static instances built from the Google Fonts variable originals; see
build_fonts.py in the design repository. Each family's SIL Open Font License is
in this folder.
