It's in the crosspost settings. They have a default footer you can use, and they also supply bits of code for the variable things, to be entered in a helpful box.
OK, I see a helpful box for appending a footer to the other post, but nothing for the local copy saying "Crossposts: blah.livejournal.blah/12345.html". Where dat?
no subject
on 2010-08-19 01:27 am (UTC)no subject
on 2010-08-19 01:28 am (UTC)no subject
on 2010-08-19 01:36 am (UTC)HELPFUL BOX IS HELPFUL.
no subject
on 2010-08-19 01:56 am (UTC)...oh that helpful box
no subject
on 2010-08-22 02:39 pm (UTC)no subject
on 2010-08-22 04:44 pm (UTC)