Sign up for an account at imgur.com then drag and drop your picture there (15 inches wide at 72DPI is a good size that will be clear, but not so huge that it screws up the post formatting)
Then copy the "direct link" of the uploaded picture at imgur.
Then here at the message board when you submit a post click the "go advanced" button under the message window.
Now you'll see a window with a bunch of icons on top. Click the yellow square with the mountain and the sun in it. Then paste the photo URL into the pop up window.
It will put some code that looks like this under your text
[IMG ]https://i.imgur.com/XStrqgB.jpg[/IMG ]
Then you get a picture.
