1.Click on Box office -> Distributors

2.In the Distributors tab you can see all of the existing distributors, click on Add distributor

3.Write the title of the distributor in the Title field

4.Click Save to save the new distributor

5.Click on Movies

6.Select the movie which you want to assign the distributor to

7.Click on the Distributors field to select the distributor you want to assign to the movie

8.Click on Save & close to save the changes