Navigate to the “Projects” tab
There you can see all the projects. Click on a specific project
Click on “Agencies” tab
Then Click on the “+Add” button at the right corner
Turn off the "Pick from Global" toggle button.
Enter the Agency name, select the type of agency from the drop-down options and select the checklist (single/multiple) then click on "next" button
Click on +Add user to add user details
Add Agency contact: Name, email (optional), mob no and designation and click on "Add"
(Note: Similar way you can add multiple users in a single agency)