Which action is required after typing the validation message in the Validation Text box?

After typing the validation message in the Validation Text box, pressing "Enter" to confirm is the necessary action to finalize the entry. This action ensures that the changes made in the Property Sheet are recognized and saved correctly. When you press "Enter," it typically signals that you have completed your input and want the system to process or save the information you've just entered.

This step is essential because, without confirming the entry, the data may not be applied to the form or database field you're working with. Other actions, such as clicking "Save" or closing the Property Sheet, do not immediately confirm the input in the same way, and simply navigating to another field might not ensure the validation message is saved properly. Hence, pressing "Enter" serves as an immediate confirmation, affirming that your input is intended and should be recorded.