You can add, edit, delete, enable, and disable watches using the Watch pane context menu.
A watch monitors the changing values of variables or expressions during your application run. As your application runs, the value of the watch changes as your application updates the values of the variables contained in the watch expression.
To display the Watch pane, click the Watch tab. The Watch pane displays a single large pane on the left. By default, this pane is set to display watch values. The Watch pane is actually two panes; drag the split bar up to reveal the lower pane. To configure a pane to view other information, right-click and choose Properties.
Another, recommended way to view a watch pane is to choose View|Debugger Context Browser. Right-click and choose Properties to configure the resulting window as a Watch window. In the AppBrowser, leave the Debugger tab selected. With this approach, you can keep viewing the Thread And Stack pane and the Data pane, while also seeing the Watch information.
If the execution point moves to a location where any of the variables in the watch expression are out of scope, then the entire watch expression becomes undefined. If the execution point returns to a location where the watch expression can be evaluated, then the Watch pane again displays the current value of the watch expression.
Watches, Inspectors, and the Current Context
Watches are evaluated in the current context. This is different than Inspectors, which are evaluated in the context used when the inspector was created.
See also:
User's Guide: Watching expressions