You can set any user to readonly except administrator.
Set/Unset Any User To Read Only.
Click on Set Read Only User button to set selected user to Read Only. Depend on access right set for selected user user can read any menus/views.
Click on Unset Read Only User button to reset read only behaviour.
Before set user to Read Only, user can able to Create/Edit/Delete/Duplicate record.
After set user to Read Only, user Create/Edit/Delete/Duplicate options are not visible. If user click on any button System will raise access denied warning.