When an account is first ingested into Backpack, a list of probable competitors is automatically generated. This data can be used as a Blueprint tag.
Go to Manage in the top menu.
Click on the desired account in the list.
Go to Account Settings in the top right—then to the Basic tab and finally the Competitors tab.
Click on a competitor's name to add them or remove them from your Competitors tag. Note: Look to the map for a visual representation of your competitors.
Click Save.