To reach this options page, select Options > Options... > File Comparisons > File Types
The controls on this page are used to specify the type of comparison window that should be used to compare files of certain types.
When Merge needs to open a new comparison window, the names of the files being compared are checked against the patterns listed for each comparison type. If a pattern matches the file names, then its associated comparison type is used to perform the comparison. If no patterns match, a text comparison is used.
Comparison types and file patterns
This control shows the types of comparison and the types of file for which they should preferrably be used.
Edit...
Click this button to display a window that you can use to edit the file patterns and filter program associated with the selected comparison type. For more information about patterns and filters, see the Edit File Type page.
Use filter programs in folder comparisons
Check this option to enable filter programs in folder comparisons. If checked, when Merge encounters a file that matches one of the patterns specified on this page, it will run the appropriate filter program on the file and compare the filtered output, rather than the original file. This enables Merge to compare the contents of files in formats that it would otherwise not understand.
Enabling this option will almost always result in folder comparisons taking longer to complete, due to the additional work performed. For more information about filters, see the Edit File Type page.
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