Whenever you type text that OneNote recognizes as a link, it is automatically formatted as one. For example, if you type www.onenote.com in your notes, OneNote turns the text into a clickable link. In this example, clicking the link opens the OneNote website in your browser.
You can also manually insert links into your notes from text you’ve typed or pictures you’ve inserted. Do the following:
Select the text or a picture from which you want to create a link.
Click Insert > Link.
In the Link dialog box that opens, type the link’s destination into the Address field (for example, http://www.onenote.com or a similar web address) and then click OK.