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@@ -796,6 +796,10 @@ decrease disk usage, and speed up `docker build` by
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allowing each step to be cached. These intermediate layers are not shown
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by default.
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+The `VIRTUAL SIZE` is the cumulative space taken up by the image and all
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+its parent images. This is also the disk space used by the contents of the
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+Tar file created when you `docker save` an image.
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+
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An image will be listed more than once if it has multiple repository names
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or tags. This single image (identifiable by its matching `IMAGE ID`)
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uses up the `VIRTUAL SIZE` listed only once.
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Sven Dowideit