I am trying to attach a file, but I can't see how to do it, What have I missed?

What I see.

While I'm at it, how do I link to an external image so that it is displayed in the post?

I also noticed that in the help area HERE none of the pictures are showing.

Thanks for the heads up on the missing images.

I will do a tutorial for adding images and post it in the FAQ when it's finished.

OK, I see that there is no 'Attachment' in the WYSIWYG editor. I have tried the 'Attachment Manager' but 2 minutes later it is still 'Loading'. I am finding the site to be rather slow at the moment. So I did a speed test to make sure it wasn't me.