In order to print Zebra labels in CMD there is a one time setup that you need to do on their computer. Please follow the steps below based on if you are using a MAC or Windows computer.
Windows
Open up your Settings page on your computer.
Click on Devices.
Select Printers & Scanners.
Find and select your Zebra Printer from the list.
Click Manage.
Click Printing Preferences.
Select the Advanced tab, or in some cases Advanced Setup tab.
Depending on the type of printer, you will find an Other or Miscellaneous button.
Set the Start Sequence to ${
Set the End Sequence to }$
Save and Close.