[ Thanks to Chris7mas for this link.
]
“Shutter is probably the most powerful screenshot
application for Linux, and the main reason for this is that it
comes with tons of configuration options for the final process of
taking a simple screenshot. And why not, considering there are
people out there who need to take a screenshot of a single window
or a desktop region instead of fullscreen only, like the GNOME
default screenshot program. Of course, there is KSnapshot which
offers these two options too, but that’s where similarities stop.“Shutter has much more to offer than the usual screenshot
program. It allows you to take the screenshot of the fullscreen,
selection (press Enter after selecting the rectangular area to take
the screenshot), window, menu, tooltip, and it also provides a
changeable delay from when you give the command until the actual
screenshot is taken. You can print the image on-the-fly directly
from shutter, without the need to open an external image
viewer.”