Image 

Could I impose on your expertise to explain to me what resizes an image to approximately the given multiple of a user's preferred width means at WP:MOS#Images? What's the difference, say, between 1.2 and 1.8? In terms of graphics layout, I come from print journalism and think in terms of column width, which of course we don't really have, except when we do. It would make sense to me if (in order to account for the device used to read WP, and so as not to make images too large when we want them to show detail) we could specify that the image take up a certain percentage of the available width, so as to leave room for the text runaround. But I think I'm missing something.