Better editing buttons for the comments

Can we have more control over the code for the comments? I've posted a follow-up to one of my posts (http://debramcneill.net/index.php/apprehensive-optimism) and I would like to edit it so that when a visitor clicks on the link in the comment, the link opens in a new window (rather than my visitor leaving my website). But I can't do that because there's no "Code" button. I can see that it's necessary to have this control on the front end but, when editing comments through the back-end of the system, I would like to be able to make additional adjustments to the code.

Can we do that? Thanks!
Debra