When you submit your application to the marketplace, there’s an option for including screenshots. However, your submission will be rejected if the screenshots aren’t exactly to spec: They must be 480x800, and not include any of the emulator chrome.
Taking a specific snippet is difficult because you either have to manually select just the right area, or to resize things after the fact. Here’s the easy way:
- Set the emulator window to 100% size, so that it uses a 1:1 pixel ratio.
- Start the Windows Snipping tool.
- The “New” button has a dropdown beside it. Change it to “Window Snip”.
- Click once within your emulator window.
The emulator has an internal window for the phone screen, so you end up with a perfect 480x800 sized screen cap.