Config Editor contains some hidden preferences that users can use. To open the Config Editor in Postbox:
- On Mac: Preferences > Advanced > Config Editor
- On Windows: Tools > Options > Advanced > Config Editor
- Click the "I'll be careful, I promise" button.
- Paste the preference you are looking to change into the Filter text field. Note: you will need to know the exact preference name in order for it to appear.
Please note that you will need to paste in the exact preference name into the Filter text field. Postbox does not support open browsing of the hidden preferences.