Allowing or preventing entry into fields
2. Click
Inspector 
in the
layout bar, then click the
Data 
tab.
3. In the Behavior area, for Field entry, select options.
Notes
•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.