Once you have created a Program, Organisation and Project Admins can add Projects into that Program to create Portfolio/Roll-Up views of Projects.

Step 1: From within the Admin area, access 'Programs' in the top menu. 

Step 2: Using the short action menu () against the Program you’d like to add Projects to, select ‘Add Project to Program’.

Step 3: Simply click the Project on the left to add it to a Program, which will move it to the right hand column. To remove projects from the Program, simply click its title on the right hand column and it will shift to the left and removed from the Program.