For converged communicators in DIG3286 (Assembling Digital Media) who are looking for a way to add external links within a WordPress post, take a look at this. It’s pretty easy.
First, highlight the text you wish to link (if you have typed an entire URL in your post, highlight that URL). Then, in the WordPress text editor box, select the Link option, which is about eight icons right of the I (Italic) icon. (You can also press Alt+Shift+A to accomplish the same thing.) The Insert/Edit Link box will pop up. There, you’ll need to include the URL of the page you’re linking to. You can do this easily by right-clicking the URL of the target page, selecting Copy (or pressing Ctrl+C), and pasting that address next to the URL in the Insert/Edit Link box. If you choose, you can also type a title for the link, but this is not necessary. One option that you might want to select, though, is the check mark under the Title field. By turning the check mark on, you ensure that users clicking the link will open a new browser window or tab and won’t be leaving your blog.