This extension helps analyzing and fixing the consistency of kerning across several master UFOs.
The interactive graph is the main point of this extension. It visualizes the values of a kerning pair across a number of masters. Sliders can be dragged up and down (currently capped to 500/-500). A double-click on a slider will delete that kerning pair for that specific master.
The list contains all combined kerning pairs for all open UFOs.
The list filter contains various pre-set filtering options to look into the kerning based on a specific factor. I found this selection useful, but it may not be exhaustive at all. such as a list of exceptions, single pairs, very large kerning pairs, etc.
Delete Pairs: Delete current pair across all UFOs
Average Pairs: Set all pairs to their average value
Equalize Pairs: Set all pairs to be the same value as the currently selected UFO
Interpolate Pair: Interpolate selected pair(s)
+/- 10: Increase/decrease all selected pairs by 10 units
+/- 10%: These buttons are silly and not hooked up
- It is possible to show UFOs with incompatible kerning groups alongside each other, but this behavior is mostly untested (see #12)
- No undo (see #11, and the warning above)
Kern-A-Lytics is only compatible with Robofont 3.