How to View FontForge Logs and Action History

FontForge does not feature a dedicated, real-time GUI "history" panel like some modern design suites, but you can view comprehensive action summaries, execution logs, and operation warnings through alternative built-in methods. Depending on whether you need a technical audit trail, a validation summary, or an edit history, you can access FontForge's output through the terminal console, the internal warnings window, or the per-glyph undo stack.

1. Launch from the Terminal for Full Action Logging

The most effective way to view a continuous summary of actions, font loading events, and internal operations is to run FontForge from your operating system's command line interface:

  • macOS / Linux: Open a terminal and run fontforge.
  • Windows: Open Command Prompt or PowerShell and launch fontforge.exe from its installation directory (typically C:\Program Files (x86)\FontForgeBuilds\bin\fontforge.exe).

When launched via the command line, FontForge streams its operational logs, background processes, memory notices, and action output directly to standard output (stdout) and standard error (stderr). You can redirect this output to a persistent text log file by running:

fontforge > fontforge_actions.log 2>&1

2. View Validation and Generation Warnings

If you need a summary log of font errors, geometry conflicts, or export issues, FontForge provides a built-in Warnings log window:

  • Navigate to Element > Validation > Find Problems to run a diagnostic across the font.
  • When exporting via File > Generate Fonts, any errors or missing tables automatically trigger a pop-up log detailing the issues encountered during compilation.
  • If closed, error output dialogs cannot always be reopened retroactively, making terminal logging the safer alternative for persistent tracking.

3. Tracking Individual Edit Actions

For standard glyph modifications (such as path transformations, point additions, or metric shifts), FontForge does not log edits in a single global list. Instead, actions are tracked locally:

  • Action history is restricted to the Edit > Undo and Edit > Redo buffers, which function independently inside each glyph editing window.
  • FontForge does not maintain an application-wide "History Panel" showing consecutive click-by-click UI actions across multiple glyphs simultaneously.

4. Logging Actions via Python Scripting

If you run batch actions or automate font modifications, you can generate your own custom summary log using FontForge's Python interpreter. Running scripts via File > Execute Script allows you to leverage Python's built-in logging module to capture, format, and save exact operation summaries to an external file.