To add a watchpoint to an existing watch:

Right-click on a watch in the Watches pane and choose Create Watchpoint from the pop-up menu.

The status bar displays the message "Watchpoint created for <expression>" to inform you that the operation was successful. If the operation fails, an alert box displays an error message.

Note: If you want to add a condition to the new watchpoint created on an existing watch, you must bring up the Breakpoints dialog box, select the watchpoint, click the Edit button, and enter the condition in the Edit Breakpoint dialog box.