To add a link to a form click + Add a link located in the Files box. 

Enter the Name and Url for the link. 

If necessary, add more links by clicking + Add more links.

When finished, click Next. On the next page you can add a note and choose the folder (if applicable) for all of the links you have just added. 

Click Finish and the links are now added to the form. 

Files/Links in the View

You can add links to the view by choosing the (files) columns located under Files in view edit or default column setup.

The files/links will be displayed in the view and the user can click directly from the view to either download the file or view the link.