Anyway, I'm sure you guys know how you can highlight a specific section of text and then, for example, hyperlink it in the editor. I think it would be cool if a similar function could be added on the template edit screen. It would make applying code easier.
For example, if you want to comment something out, currently you have to type <xen:comment></xen:comment>. However, with my suggestion, you would highlight the code you want to comment out and then click a button that adds the <xen:comment></xen:comment> tags.