My friend sent some pictures by email. The only thing I see is a red diamond in the corner of the picture. Do I need something for Thunderbird to view them, or something for windows? Could it be an Acrobat picture file?

What happens when you right-click on it?

By default, Thunderbird will not display pictures unless you decide to. There should be a message somewhere that tells you that it has blocked some images... right-click on that for options in dealing with those images.

<font color="cyan">Whats Thunderbird?</font>

An email client from the folks at Mozilla... the ones who brought you FireFox as an alternative to IE.

Check www.mozilla.org for details. I've been using it for a couple of years now on all my machines.

Right clicking on the image (or white area where the image is) gives 2 options: select all and copy image location?

There's no button for "show images" which it sometimes has.

I think I need a plug-in.

<font color="cyan">We have FF installed on our computers, but I just prefer IE. My brother uses FF.</font>

I think Firefox is like, more better, eh! [img]smile.gif[/img]

What's the extension on the picture file?

I'm not sure. That's why I right clicked it to get properties, but it doesn't come up.

Does a View/Source give you the extension?