2. In the Inspector, click the Data 
tab.
1. In Layout mode, select one or more fields.
2. In the Inspector, click the Data tab.
3. In the Behavior area, for Field entry, select options.
•Preventing entry into a field only affects the field object on that layout. To always restrict access to a field on any layout of the database, define a privilege set to permit "view only" field access for that field. See Protecting databases.
•When you prevent entry into a field in Browse mode, it’s no longer possible to copy data in that field to the Clipboard. If you want to prevent a field from being changed and still permit Clipboard copying, define the field to enter an auto-entered value and select Prohibit modification of value. See Defining automatic data entry.