# Using the External User Exit Templates

All the external user exit templates are located in the `\cm_templates` directory. Once the UI Program to be extended is known, the appropriate user exit template can be selected from the templates directory.

- Use any editor that supports the JSP file editing and open the approprite user exit.
- Determine the base user exit around which to insert your external user exit.
- Uncomment the necessary functions, and add your code.
- Save the external user exit file as `ext_<JSPfilename>.jsp` under the `\cm` directory. Where JSPfilename is the JSP file you want to extend.
- Test.

Parent topic: External User Exit Templates