To change a link:

Choose View > Sidebar.

Choose Annotations from the pop-up menu at the bottom of the sidebar, and then select Include Links.

Select the link.

Choose Tools > Inspector, and then click Annotation.

To link to a website, choose URL from the Action pop-up menu, and enter the full website address in the URL field.

To create a link to another page in your PDF document, choose “Link within PDF” from the Action pop-up menu, go to the page you want to link to, and then click Set Destination.