This is a plugin for the Glyphs font editor by Georg Seifert. It calculates all active instances for the given glyph and draws them behind your paths. By default, it draws all active instances on top of each other using a transparent fuchsia/lavender color:

After installation, it will add the menu item View > Show Interpolations. You can set a keyboard shortcut in System Preferences.

1. Download the complete ZIP file and unpack it, or clone the repository.
2. Double click the .glyphsReporter file. Confirm the dialog that appears in Glyphs.
3. Restart Glyphs

1. Open a glyph in Edit View.
2. Use View > Show Interpolations to toggle the preview of the instances.

To only view specific interpolations, add this custom parameter to the instance(s) you want to preview:

Property: ShowInterpolation
Value: -
Value: .1;.8;.2
Value: 1;0.5;0;0.1

The Value defines the color of the instance. You can either leave the value blank to use the default color. Or, you can set semicolon-separated RGB values between 0 and 1. If you supply a fourth value, it will be interpreted as alpha (opacity).

The plugin needs Glyphs 2.x or higher, running on OS X 10.9.5 or later.

Copyright 2014 Rainer Erich Scheichelbauer (@mekkablue). Based on sample code by Georg Seifert (@schriftgestalt).

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

See the License file included in this repository for further details.