Adding new file types and extensions

Last published : Apr 02, 2026
The most common file types and extensions are already defined for you. However, you can add additional file type categories as needed.
To add a new file type and extensions
  1. On the Tasks menu, click Options.
  2. Click File Types.
  3. At the bottom of the File typeslist, clickAdd a file type(+).
  4. Type a descriptive name of the new file type category, and then press Enter.
  5. At the bottom of the Extensions forlist, clickAdd an extension(+).
  6. Type an asterisk (*) and a period, followed by the extension of the file type you want to define, and then press Enter.
  7. Click OK.
See Renaming file types and extensions.
See Restoring default file types and extensions.
See Deleting a file type and all of its extensions.
See File types and file extension.
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