If you want to bulk edit multiple domain names at the time you can do so for up to 100 domain names at once from the Domains overview in your account. Here you can select up to a 100 domains names and then click the Edit Selection button on the top of the grid.
Select the “Bulk edit” option in the popups screen next:
Now you can edit a variety of settings for your domains. To copy a value to all the other domain names in the selection you click on the small “copy” on the right-hand side of the input field.
Don’t forget to click the green Process button at the bottom of the page to save all your newly made changes.