Can’t copy to clipboard

I’m using the Mac app, not the Chrome extension.
Capturing is easy with a menu-bar icon. Lots of annotation features. But as far as I can tell, there’s no way to copy a screen grab to the clipboard: there’s no “copy” command in the toolbar, there are no right click options, and command-C doesn’t work. You have to save the image and copy in another app. That’s a deal breaker for me.

Yoritsugu about Awesome Screenshot- Capture, Annotate and Share, v1.1