In P4Merge, you can set preferences using the View menu, the toolbar, or the Preferences dialog. Toolbar and View menu settings are temporary and do not carry over to future sessions. To configure default settings for application font, text format, file format, application language, icon scaling, comparison method, or web services, go to Edit > Preferences (Windows) or P4Merge > Preferences (Mac).
To configure P4Merge settings for the current session to:
If you are comparing Unicode files, selection of the correct character set is essential. If you select the wrong character set, P4Merge cannot correctly diff files. For configuration, go to File > Character Encoding or Edit > Preferences.