You can only edit source segments if source editing is enabled in your project settings. This is enabled during project creation or during the project lifecycle, for an existing project.
Procedure
- Go to the Home tab, and then select Project Settings.
- In the Project Settings dialog, in the navigation tree, select Project.
- Do one of the following:
- To enable source editing, select the Allow source editing checkbox.
- To disable source editing, clear the Allow source editing checkbox.
Note: The option may be disabled in some scenarios.
- Select OK to close the Project Settings dialog and save your changes.