Unable to insert images into the message

I am trying to post a message. I like to insert two images to explain better the problem, but I have not found the way to do it. The images are on the hard disk.
Can somebody help me?
Thanks.

you can only attach one picture at a certain size.

what i do is upload the image to my homepage, and then link to it with the

I think that "with the" should be "with the image link button", right?
In any case I will try what you suggested.
Many thanks.