Hi Cory -- welcome!!
To post a picture, look below the message box and you will see three green buttons. The one on the right you have already used in order to communicate with us. On the left is a green button that says *Upload an Image*. Click on that and your computer will bring up a window with the picture options to upload. Click on the picture of your choice, then click on the button that says *open*, at the lower right of that window. That's all it takes -- your computer will transfer the image to your message.
