Option settings globally impact product behavior. Many options are provided to enable you to configure File Compare/Merge to function in a way that you desire. Option settings are provided at a general level and for both file and folder comparisons at a more granular level.
The File Compare/Merge options are available using on the main menu of the File Compare/Merge window, or pressing CTRL+SHIFT+P. A tree hierarchy on the left side of the File Compare/Merge Options dialog box divides the File Compare/Merge options into three main categories, General, File Comparison, and Folder Comparison. Clicking on a node in the hierarchy displays its corresponding page of option settings in the right side of the dialog box.
You can reset the options to their default values by deleting the config.properties user settings file found in your <user home>\.fcm folder. (For example, in Windows it would be C:\Documents and settings\<user home>\.fcm\config.properties).