When creating a new typography, the copy-fit sets, that you display by clicking on the CopyFits tab, is empty and it appears as:
The procedure to add copy-fit sets is explained in Fitting presets.
All related topics
Methods to fit content to assigned space
Area border color and non-fitting values
Shrinking and stretching methods
Shrinking and stretching steps
Fitting a headline for one line (one-click)
Fitting body by predefined fitting presets
Spreading flexible spacing evenly
Fitting body by setting variable leading (line spacing)
Fitting body by setting variable paragraph spacing
Fitting body by applying a fitting style