Setting debug breakpoints
Debug breakpoints can be added and removed in two ways:
•  Click the desired line number to toggle.
•  Place the cursor in the desired line and click Debug Toggle Breakpoint from the menu bar or click the Toggle Breakpoint toolbar icon Image.
When a breakpoint is set, the line number is highlighted in red and a red dot appears to the left of the line number.
After adding one or more breakpoints to the script, the Debug menu bar and toolbar buttons can be used to control script execution while analyzing the script.