Setting breakpoints allows a script to run up to specific point of interest. Place breakpoints at specific lines in a script where you want to halt execution of the script. When you playback the script, it runs to the first breakpoint and suspends execution until you tell the script to proceed. Breakpoints allow management over the execution of scripts to facilitate debugging, and can help isolate where scripts fail. Clicking in the left margin of a specified line sets a breakpoint; click in the left margin of the same line again clears a breakpoint.