This article will guide you on how to assign a list from the campaign.
You will need to go to the campaign settings and go to the Leads tab.
From there, scroll down to the Lists section which is right above the Leads Summary.
You will need to press the button to the right called Assign Lists.
After you click on the button, a popup will show to let you choose a list from the dropdown menu.
Once you click on Assign, the list will be assigned to your current campaign.