Just above the box where you are typing there is a tool bar - Click on "HOST AN IMAGE"
This will open a pop up box
Click on "FILE" and then "BROWSE" (N.B. Some Browsers may give the option "CHOOSE FILE")
Find the photograph on your computer you want to insert and click on it.
Click on "OPEN"
Click on "HOST IT"
You will see three lines of hyperlinks with "Copy" next to each of them.
Click on "COPY" on the middle line
This will highlight the link
RIGHT CLICK on that link and click on "COPY"
Go to your post where you would like the photograph to appear and "PASTE"
Click on "SEND" in the box just below where you are typing.
Your photograph will now be embedded in your post.