Yes, you can navigate to My Lists. Make sure that each of your mailing lists are uploaded here. You can select the lists with the button on the far left and "Merge Lists" button will appear near the top of the screen.
Yes, you can navigate to My Lists. Make sure that each of your mailing lists are uploaded here. You can select the lists with the button on the far left and "Merge Lists" button will appear near the top of the screen.