Free accounts get 3 images to choose from when posting, paid accounts get much more. You can modify your user pictures via http://www.livejournal.com/editpics.bml and can choose which one to use from the "picture to use" drop down on the Journal update page (http://www.livejournal.com/portal/). All of the various LJ posting clients also have ways to set the image.
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Date: 2004-11-03 05:59 am (UTC)