wiki:FAQ

Version 2 (modified by Mikhail Malyshev, 5 years ago) (diff)

Image file naming and frames settings

Please keep in mind that images can enforce the removal of the usual image button frame in case they come with their own frame included in the image are are named ArrowUp_framed.mim instead of ArrowUp.mim for example. In this case MUI will trust the images to provide a proper frame and will not draw the frame defined for image buttons. Hence the arrow buttons of scroll bars (I think you are talking about these, because you have your very own naming for them) end up without the normal frame, but with the frame provided by the image itself instead.