Clear All Security
The Clear All Security button removes all security restrictions from all variables without having to apply this setting individually to each variable. This button also removes all security restrictions on annotations (i.e., checks all three boxes related to Annotations security).
Disallow All Edits
The Disallow All Edits button sets the security option for all variables to Disallow Edits without having to individually apply this setting to each variable. This button also unchecks the “Allow All Edits" button.