Ubuntu – How to take Screen Shot in Ubuntu

This can be done in gimp

• Select the oval tool
• Make sure the edge settings are fuzzy
• Select the areas you want to put emphasis
• Invert selection
• Select Fill tool
• Set to color and include alpha settings ("alpha" is transparency)
• And fill the selected area outside the ovals.

I believe Screenshot Captor is the tool you're looking for. It involves a slight learning curve though and the scrolling window capture feature might seem intimidating at first.

It can capture objects, meaning content within windows with scroll bars (horizontal and vertical), individual program controls, etc.

It is quite powerful but some tweaking with the settings may be necessary to get what you want and hence, the learning curve.

If you try the program and it doesn't work for you, before you dismiss it, watch the videos listed on this page, especially this one about basic scrolling window capture.

Here's an example capture of a scrolling Windows Explorer window (click to view full size):