Script Debugger can mark the lines of your script that were actually executed. This can help you survey the path of execution without tracing or stepping. For instance, you can easily see whether there are areas of the script that are never being executed. To turn this feature on or off:

• Choose Script > Show Code Coverage. If the menu item is checked, code coverage is on, and lines subsequently encountered by the path of execution will be marked in blue in the gutter (and a small line appears in the vertical scroll bar).

To clear code coverage marks without turning code coverage off:

• Choose Script > Clear Code Coverage.

Code coverage marks are also removed when you start to execute the script.