Dennis, I did give it a try. Handy for just defining the part of the screen you want. I'm using a trackpad,so while I could get away with the highlight tool, the pen tool would just look sloppy. Too bad yellow is the only highlight color,but as it goes with Microsoft's stock accessories,you get the very basics.
You have given me the idea to search for a better third party alternative,one that allows annotations without having to open in Photoshop.
Here's an open source one for Windows, Greenshot http://getgreenshot.org/
Edit: I'm so impressed with what I could do for just a few minutes after install,I sent in a donation, and encourage others to do so if they can.
Gene, that looks interesting. The likely usage is always going to be to grab a Photoshop panel or part of a Photoshop screen, so if you have Photoshop open, it negates the time savings of using a third party app. I will give Greenshot a try though thanks. To be really useful, it needs to work as a background process that can be called with a couple of keystrokes.
If you start it up with Windows, it runs in the background and it will indeed marquee select a region in Photoshop (or anywhere else as soon as you press the PrntScr key.) The editor will at allow annotation and highlights on the fly a lot easier from say, marquee tool/edit > stroke to make the same red outline in Photoshop and w/o tying up Photoshop for the edits.
I'll know more as time goes on,but it looks to be a great screenshot utility.