You type values into the Track Kerning Table in the same manner as for the Pair Kerning Table. There are five text boxes to consider.
For the kerning degree, negative values specify tighter kerning, and positive values specify looser kerning. The minimum size specifies the smallest size in font units for which track kerning applies, and the maximum size specifies the largest font.
The minimum amount specifies the amount of track kerning to apply to fonts of the minimum size and below. The maximum amount is the track kerning to apply to all fonts at least as large as the maximum size.