In the Shipment History window, select the shipment for which you want to complete an activity.
On the Home tab, select Mark Shipment. The 
shipment icon and the 
package icon change to 
and 
respectively.
You can mark or unmark a single shipment or multiple shipments in the Shipment History window and then complete various activities on the marked shipment(s).
To mark a shipment:
In the Shipment History window, select the shipment for which you want to complete an activity.
On the Home tab, select Mark Shipment. The shipment icon and the package icon change to and respectively.
To unmark a shipment:
In the Shipment History window, select the marked shipment (noted by ) that you want to unmark.
On the Home tab, select Unmark Shipment. The marked shipment icon and the marked package icon change to and respectively.
To complete an activity on marked shipments, see Perform an Activity on a Marked Shipment.