Create a custom script include and code when you register it against a selected scripted extension point. Through registration, you create an extension instance record that links the extension point definition to its implementation in the custom artifact.

1. Navigate to System Extension Points > Scripted Extension Points.
2. In the Extension Point [sys_extension_point] table, select the scripted extension point that you want to register a custom script include against.
   Note: This listing includes the scripted extension points that you created and any pre-defined scripted extension points that are embedded in Now Platform functions (for example, Customer Service Management and Field Service Management).

   To learn more about the functions that contain the pre-defined extension points, see the Related Topics links in Using extension points to extend application functionality.

3. In the Extension Point record, click the Create Implementation related link to create a new custom script include and register it against the selected scripted extension point.
4. In the Script Include form, create the custom code.
   To learn more about creating script includes, see Script includes.
5. Click Update.

Review the listing of custom script includes that are registered against a scripted extension point. Extension instances indicate the application scope in which registered custom script include are used, and provides a link to each. You can also activate or inactive an extension instance.

1. Navigate to System Extension Points > Scripted Extension Points.
2. In the Extension Point [sys_extension_point] table, select the scripted extension point.
3. In the Implementations related list of the Extension Point record, select a scripted extension instance.
   The system displays the Extension Instance record.

   Table 1. Extension Instance record

   Field	Description
   Point	Unique name for the scripted extension point. The name can be up to 100 alphanumeric characters, including special characters.
   Class	Script include in the application code in which the scripted extension point is implemented.
   Application	Application scope against which the extension point is assigned. This is system-assigned and cannot be changed. For more information about the protections that are offered by the use of scoping, see Application scope.
   Active	Option for activating an extension point in the current instance.

4. Click Submit.