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Images edit mode
When you open an alternative image in edit mode you will see a panel named 'Missive', click the triangle to expand it if it is not already open. To make these settings apply you must select 'Use these settings' and then make any other selections you want. These other settings are just a convienence method of jAlumb's context sensitive menu to include, include original or use original. As an example, if use these settings is checked and included is not then the image will be excluded before the album is made. Its more likely use is to be able to set the include original or use original attribute differently to the primaray - maybe you want the primary original included but not the alternative's.