You can protect individual fields on a form from changes if you like. For instance, I might protect the AKC Registration # field in my Kennel database from changes, so I don't accidentally overwrite these important numbers.
To protect a field on a form:
Open the form in Form Design view.
Right-click on the field and select Properties.
Click on the Data tab.
Change the Locked property to Yes (see Figure 28.2).
Close the Properties box.
You can protect an entire form from changes, making it "read-only." For instance, if you kept your company's work schedule ...