Rules Window Toolbar - Local tab

Rule
The Rule button will create a new rule.
Trigger
The Trigger button will create a new trigger.
Edit
The Edit button edits the selected rule or trigger.
Delete
The Delete button deletes the selected rule or trigger.
Apply
The Apply button applies any rules that are available in the Apply Rules menu to all open mailboxes.
Show Triggers
The Show/Hide Triggers buttons shows or hides the triggers list area.