The screenshot should automatically save to the
You can get the prompt to save or copy the screenshot (right) by using the 'Screenshot' dialogue (search in the overview for
screenshot, or run
gnome-screenshot --interactive). This also enables you to include options such as whether to include the mouse pointer etc.
You can also set in Keyboard settings what commands can be used for Screenshots - so you for instance to screenshot copy to clipboard by using Ctrl+Print Screen (or whatever is set in the settings):
If you want to have the screenshot dialogue open, add you can add a custom keyboard shortcut to launch
gnome-screenshot --interactive - I use Super+Print Screen: