Google Sites – Can a Hyperlink Close the Previous Window?

A very simple low-tech work-around is to maintain a file (e.g., Word, outlook task, etc.) with a list of these hyper-linked phrases and copy-paste the one you need into Gmail.

Another option that should work in most email clients like outlook is to define a simple signature for each such hyper-link.

This is accomplished by setting max-width or width property in CSS on the enclosing element (usually, navigation links are enclosed in <li>). However, Google Sites doesn't give access to the template's CSS so there's no way to do multi-line navigation links.