By the way, what is the function of the "yo" buttons? When I run the program, they have no effect?
Yes, the buttons aren't bound to any event handlers
The purpose is to demonstrate that buttons are drawn ontop of the panelimage, the panelimage is background image, if you resize the frame/window, the background image should resize, but the buttons wouldn't resize, and you should see the buttons remain ontop of the panelimage
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