+After communication in issue tracker was decided to create an option in menu with show a window for color modification.
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+* I tried to check a project structure.
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+* I found and added new option into menu.
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+* I can not find a definition of already existing "Options" window. I also can not find text used in this window due to many language mutations.
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+* My friend who works with C++ and Qt wasn't able to find another window definition as well.
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+* I tried to read something about HWND and graphics in C++ for Windows, but I realized that modification by total C++ beginner could do more harm than good for Sumatra project.