[deback]

I just did some experimenting with different common options settings for the cover image. When the SVG Cover is checked or unchecked and the Preserve Cover Ratio is checked or unchecked, there is no difference, and the image does not get centered and doesn't move when ADE is dragged on the side. There is blank space at the top and bottom, and the left and right margins are not centered. These are the reasons why I don't want to use an SVG wrapper. The cover image displays the best in ADE when I have "No SVG Cover" checked in the options.

When I use the code I pasted in my first message in this thread (which Calibre generates when you add a new cover image--so why doesn't Calibre generate it when I just convert and don't add a cover image?), the image is perfectly centered with white space on the side margins and the image moves when ADE is dragged on one side. I prefer the way this looks the best, but I have to manually copy and paste that code over the "SVG" code that doesn't even have a "text-align: center" code in the CSS rule for the cover image.

I won't be programming any plugin, since I'm not a programmer (except for some Applesoft programming decades ago, writing batch files, and basic HTML). But I do like the Modify EPUB plugin. This will save me lots of time in the future. Thank you for your help with this.