I recently came across a program (BaronReplays) that has a transparent image on its left side of the GUI main window (check image).
Can this be done in Java and if so, what keywords do I have to search for? Google always came up with different topics when I tried to describe that customized kind of window.
In the screenshot below you can see a dragon-like image (big red box) on the left side of the main window, parts of it are transparent (small box).