# External editors

Sometimes you may need to use an external program to edit a file in the Workbench. This can occur, for example, when the Workbench has no editor for that file type.

The external program will be used if that program is registered as the system default editor for that file type and no other editor is registered for that file type in the Workbench. For example, on most systems the default "editor" for HTML files is a Web browser. If there is no other editor associated with .htm and .html files in the Workbench, then opening an HTML file from the Workbench would cause the file to be opened in a separate browser session.

The Workbench
Editors

Opening files for editing
Associating editors with file types
Editing files outside the Workbench