A captured image can be dragged to another application or document. If the application is able to handle images, a copy of the full image is inserted there.

If you drag a screenshot into a file manager window, a dialog pops up where you can edit the filename and select the image format and the file will be inserted into the actual folder.

If you drag the screenshot to a text box, the path to the temporary saved file is inserted. This is useful for example to upload a screenshot through web forms or to attach screenshots into bug reports on the KDE bugtracker.

This works with all clients that do not pick up the image data, but only look for a URL in the dragged mimedata.