Final answer:
Click the Default Value button in the Properties group on the Table Tools Fields tab to open the Expression Builder for entering a default value in a database field.
Step-by-step explanation:
You are instructed to click the Default Value button in the Properties group on the Table Tools Fields tab. Doing so will open the Expression Builder dialog box, offering choices for setting a default value for a field in your database table. This function is often used in database software like Microsoft Access, where you can specify a value that will automatically appear in a field when a new record is created. The Expression Builder is a powerful tool for creating expressions that can calculate values, validate data, or create complex formulas for your default field values.