Hi Lindy, click reply, then bottom right corner "use rich formatting", along the top "insert", drop down menu it's the 2nd one (don't forget image must be smaller than 4MB so you may need to crop it, or otherwise make it smaller) From : file upload. Find the image on your computer then in the dimensions box, put 800 in the first, and leave the 2nd blank. Not very user friendly I'm afraid!
Looking forward to your pics