Add Web Links
When creating documents for distribution online, adding web links can be very useful, but there are some quirks here. To add a web link, simply select the word or phrase to which the link is to be attached, choose Link from the Text submenu under the Format menubar item, and then enter the desired web site address.
Though any RTF-savvy application can recognize those web links and pass on the embedded addresses to your web browser, the pretty blue-and-underlined formatting you see in TextEdit that shows that something has a hyperlink attached to it doesn’t necessarily appear in the other applications. To make it obvious that a certain word or phrase links to a web page, use the Font palette to color the text blue and stick a line underneath it, so that it looks more like a hyperlink, regardless of whatever application the document is viewed in.
Incidentally, hyperlinks aren’t limited to web page addresses; you can embed any type of link recognized by the operating system, such as e-mail addresses and FTP addresses.