Watch window
- Last UpdatedOct 29, 2026
- 2 minute read
The Watch window is a debugging tool that lets you: watch and force values to project tags; execute and test functions; and execute and test math expressions. It is dockable, which means you can drag it to another position in the project development environment.

The Watch window contains the following elements:
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For each item that you want to watch during project run time:
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Tag/Expression: Specify a project tag, system tag, or expression that you want to watch.
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Value: Displays the value returned by the tag/expression.
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Quality: Displays the quality (GOOD or BAD) of the value returned by the tag/expression.
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Continuous: Select this option to have the project continuously evaluate the tag/expression.
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DB tabs: You can use these tabs to organize the items you are watching, so that you do not need to scroll through one long list of items. You can save tab configurations for later reuse and reload them as needed. Additionally, you may create new tabs, as well as rename or delete existing ones.
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Locals, Stack Frame, and Tasks Frame tabs: These tabs are used to debug VBScript.
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Scroll bars: Use to view areas of the Watch window that are obscured from view because of the window size or the size of the current sheet.

The following actions are available from the Watch window:
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Add Watch Tab: Adds an additional watch tab.
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Rename Tab: Rename an existing tab.
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Remove Tab: Removes a specified tab from the Watch window.
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Import Tags/Expressions: Import into the tab all the tags and expressions that were saved in a file.
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Export Tags/Expressions: Exports to a file the all the tags and expressions that are present in the selected tab.