When I change the mouse wheel settings in Windows 7 to scroll higher number of lines the changes are not reflected in QtCreator, even after restart. Other desktop applications (Firefox,MS Word etc) follow the changes and scroll faster, while QtCreator acts like nothing has changed. The mouse driver is the standard one that comes in Windows and used for various types of mouses. I tried this with 2 different mouses with no lack. The same happens in the editor and in the Help pages inside QtCreator.