Unbound Controls
Some controls do not
need to be bound to a table. You can use an unbound text box
to display information that you do not need to store. A
calculated control is another example of a Text Box that isn't bound
to a Control Source.
Try It; Create a Calculated Control
Open the sample
Split View form in Design View.
Go to Form Design
Tools ->Design.
Create a Text Box.
Select the unbound
Text Box and go to the Properties.
Go to the Control Source and
click on the three-dot builder to create an expression.