Comment 67 for bug 927952

Kris, generally people won't see comments on closed bugs. Please open new bugs for new issues.

But try this:
1. Open the Settings app.
2. Navigate to Devices > Keyboard.
3. About halfway down the page are keyboard shortcuts for saving screenshots directly to the "clipboard".

Basically, just hold down the Ctrl key while using your usual keyboard shortcut.

This is mentioned briefly in
https://help.ubuntu.com/stable/ubuntu-help/screen-shot-record.html

Also, if you want to choose the name for the screenshot, just use the Screenshot app instead of the keyboard shortcut.