Font Highlighting Editor for the Processing Development Environment
Font Highlighting Editor is a Processing tool that acts as a simple visual editor for the environment's font coloring settings.
Installation - Automatic
Install the tool using Processing's contribution manager. (Tools → Add Tool...)
Installation - Manual
Download the latest release.
Navigate to Processing's Sketchbook folder (the location of it is shown in Processing's Preferences dialog: File → Preferences). Inside it, create a folder called "tools", if it doesn't exist already.
Extract the downloaded archive into the tools folder.