An instance is a promise, a location in the design space that could become a UFO. It is the typographic equivalent of a quantum mechanical particle: only there if you look at it from a specific angle and only all the contours hum at the same frequency. The preview helps you find the right place in the design space. You can add family name and style name and specify which groups of data it should make. Then you generate the instances.


Double click on an instance in the list to get to the settings. The panel is similar to the master popover, but it has some important differences. The checkboxes at the top control which data is generated.

  • Makes all glyphs: check to generate all glyph geometry.
  • Makes the kerning: check to generate the kerning data. (just the pair data, not the groups)
  • Makes the font info: check to generate the font info.

The next checkboxes determine which data is copied from the masters. Most of it will be obvious. It is not necessary that all this data comes from different masters. It might actually be useful to just have one master as the source for everything, but at least now you have control over what goes where.

  • Copies font features: check to copy the features from the master designated as the source for the features.
  • Copies font groups: check to copy the groups from the master designated as the source of the groups.
  • Copies font lib: check to copy the font lib from the master designated as the source of the font lib.


The Family Name and Style Name combo boxes offer lists of the names that are already present in the project. But you can also enter a new one.


Same as the note in the master popover. This note is just for use in the Superpolator document, it is not exported to the instance.


Select an axis to edit its value. Enter numerically or by dragging the slider. Green icon next to the axis name indicates the interpolation is isotropic. Use the menu on the right to set the selected axis to anisotropic if you want different interpolation factors for horizontal and vertical.