Within the "Bulk Purchasing Mode" screen, go to the "Mark Code" filter. By default, the system displays all of the Prebook product lines, with and without Mark Code. 

Enter the "Truck DateFrom" and "Truck Date To" in the specific filters. Then, within the "Mark Code" search field, select the option "Specific" and a blank search field will appear so that you can type a specific Mark Code you want to filter by. 

 Enter all the specific Mark Codes that you want to filter for. The system will separate the Mark Codes as tags when pressing the space bar after entering each different Mark Code. 

Click on the "Search" button and the system will show the results depending on the Mark Codes you filtered by.

Also, you can select the "Empty" option then click on "Search" and the system will display all the Prebooks line items without a Mark Code.