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| Hello again; I did some tests and maybe there is a bug in BarcodeImage or BarcodeRecognize: I tried to test the code Graphics[Rectangle[Reverse[#]{1,-1}]&/@Position[ImageData[BarcodeImage["http://www.wolfram.com/","QR"]],0]] with some... |
| I think that I see what you mean. The Tooltip isn't transparent in the sense that you can see through it to whatever is behind it (the Sin[x] plot in your example). Instead, it seems to take one the background color of the stylesheet. Somebody else... |
| Thanks for your answer!! Now the question is: Why has the plot function the attribute HoldAll??? Thanks again :) |