To post an image it must be hosted elsewhere.
The easiest place to host an image is on Google images or another cloud service.
Once you have the image location just highlight and "copy" the image address location.
Click the "Img" button on the top of the posting page and the cursor will drop in between the .
Just paste the link between the two and you will see a link address appear.
If the image doesn't appear in the preview page you did something wrong.
That should be it.
