Navigate project data to resolve a warning

In the main Notifications panel, click the Errors and Messages buttons so only the Warnings appear on the list.
Highlight one of the warnings.
Information about the warning is displayed under the columns Description, Object and Field.
Double click on the warning.
The Properties For: Site dialog appears with the Moisture Zone property highlighted, and set to Undefined.
Select Moist (A) as the value for Moisture Zone.
The warning Value should be specified is immediately removed from the Notifications panel on the Properties For: Site dialog.

Tip: The warning Value should be specified on the Notifications dialog has not yet been removed.
Click OK on the Properties For: Site dialog.
The new Moisture Zone value is applied to the Site object, the Properties For: Site dialog closes, and the warning Value should be specified is removed from the mainNotifications panel.