You can set source breakpoints in a script in any of the facilities described in Ways to Set Source Breakpoints (see Ways to Set Source Breakpoints).

Move to the line in the script where you want to put the breakpoint and click the line number.

The Debugger inserts a breakpoint at that line, as indicated by a Stop sign icon:

For more information on how to deactivate or reactivate a breakpoint, see Deactivate and Reactivate Break Conditions (see Deactivate and Reactivate Break Conditions).