[SOLVED] How do I make one custom link in the Pages Menu?

I don't see this posted anywhere, and don't know if it is possible, but I would like to link one tab in the pages menu to an outside url, e.g., my ticket vendor. I have other links available, but a link on the ticket tab would be quite elegant. For now, the tab goes to a dummy page on my website. The alternative is to eliminate the page altogether and rely on other buttons, which are working now thanks to juggledad catching my error.