First hit reply button that is highlighted below.



Then you can hit the insert image button as seen in this picture.



Then plug in the image url in the highlighted space and hit insert in to message.



Alternatively you can download the image to a folder on you pc then submit it using the attachment box as seen here.



You will first hit the browse button. That will bring up the browse dialog box.



In there you will find where you saved the image file to and select it and hit open. You will then see the file show up as shown.



Hit add file and it will upload the file and the reload the page. You will then see the attachment here.



To add the picture in line with your text just place your cursor in the message box where you want the picture to be added and hit place in line.



Then it will look like this.



That is your newly attached image. Here it is in the thread after hitting submit.