Mark:
I can edit messages -- so I edited your post - and with chrome on a win 10 computer - I select the image and there are resize boxes in each corner ... I just select and slide the lower left box toward the center.
as far as images - and how to get them into a message... I have for the WOA a Picasa/Google + photo site https://plus.google.com/+WoaWestsail and I upload images into a photo album - making sure that the album and photos are shared to the public.... then when viewing the image (with a browser) - I right click and choose copy ...
I then open a forum post and paste the image into the message body and do the resizing thing above.... the lower left corner is usually available to select and slide around.
So here is Dave King showing me a broken eye bolt w/o resizing.
Here it is resized.
Of course Google is changing picasa to something else call google + ... so messing up links in the process.
HTH
Jay