Adding a hyperlink in a note is similar to adding a hyperlink to a map topic.
In the Topic Notes window, click where you want to add the hyperlink (if you select some text or an image, the selected objects will be "hot" and will open the link when clicked.)
Do one of the following:
On the Topic Notes Toolbar, click Hyperlink.
Right-click inside the topic note, and then click Add Hyperlink.
Press CTRL+K.
Define the link. See Add hyperlinks for additional information on the various types of links you can add.
If you intend to export your map to Web pages you can choose how hyperlinks in notes and their target files are handled: On the Format tab, in the Styles group, click Map Style, click Notes, then click Hyperlink Options. This setting applies to the current map.