The one's I'm looking at in this case are images: jpeg s. I've never seen images display inline, though html s sometimes do. These are about the only ones that I can think I would want to see inline. Anything else is probably better as a separate file . Most other email apps seem to support this no problem. The composer can paste an image, write a caption, paste another image etc; and the recipient sees this pretty much as the author has created. I cannot get Tbird to either create or view this sort of email.

Yes to both of these. Here's an interesting twist: A few days ago I set up a new profile. This profile displays photos inline on incoming mail. I have not tried sending, but for the same message recieved by the two profiles, the old one only makes the jpegs available as separate attachments, where the new one shows them inline as well. I have tried to compare settings in the different profiles to see what is different, however this is not easy considering that I can have only one copy of Tbird open at one time (so far as I can tell) so switching back and forth is slow.

We have partial success. I followed the above instructions, and now the images show in the message pane, only after the rest of the message, not along side the text as the author clearly intended -- there's a string of characters where the images are intended to appear. However this is more than I have seen in seven years of using Tbird, so it's progress. Of course, the new profile shows exactly what I think it should. It will be awhile before I get the time to experiment more with this. Thanks for your help.