plugin for live-previewing all interpolated instances of the current glyph.
Latest commit 4dd538d Sep 5, 2016 @mekkablue Added gitignore


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:

All instances are shown live.

After installation, it will add the menu item View > Show Interpolations (de: Interpolationen zeigen, fr: Montrer Interpolations, es: Mostrar Interpolaciones). You can set a keyboard shortcut in System Preferences.


Please install the plugin via the built-in Plugin Manager, available via Window > Plugin Manager. If this is not possible for some reason or another, follow these steps:

  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

Usage Instructions

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

To center the interpolations under the frontmost layer, Ctrl- or right-click anywhere in the canvas to invoke the context menu, and choose Center Interpolations (de: Interpolationen zentrieren, fr: Centrer interpolations, es: Centrar interpolaciones).

Toggle the centering of interpolations via the context menu

To toggle the setting back, open the context menu again, and choose Do Not Center Interpolations (de: Interpolationen nicht zentrieren, es: No centrar las interpolaciones, fr: Ne pas centrer les interpolations).

Alternatively, you can also align at a certain node. To do that, select a node, bring up the context menu, and choose Align Interpolations at Selected Node (de: Interpolationen an ausgewähltem Punkt ausrichten, es: Alinear las interpolaciones a nodo seleccionado, fr: Aligner les interpolations au point selectionné). The node in question will then be marked with a star. To cancel point alignment, select the starred node, and choose Do not Align Interpolations at Selected Node (de: Interpolationen nicht an ausgewähltem Punkt ausrichten, es: No alinear las interpolaciones a nodo seleccionado, fr: Ne pas aligner les interpolations au point selectionné) from the context menu.

Custom Parameter

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

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