I'm writing a special image format preview app with QuickLook extension. What's the preferred way to resize the QuickLook preview panel so that it fits the screen? https://github.com/yllan/JXLook/issues/12 Manually setting preferredContentSize worked for image that's smaller than the screen size. However, if I need to scale down to fit the preview window in screen, is there some way to tell the window just fit the content size to screen? I tried manually calculate the size with window.constrainFrameRect but it didn't return the desired size that fitting into screen when calling in QuickLook extension. (It worked in main app though)