In case it helps Timber...
There are two ways to show photos, depending on where they are on the web.
If you have uploaded them to a photo sharing site such as Flickr or Imgur, you use the toolbar button to insert a pair of tags and put the url of the photo between them. This works for any size of photo.
If you want to upload your photo to ukw, you first need to shrink it below 256kb file size.
Then look below the image editing box to "upload attachment". Click the button, find the file you want then "Add the file".
Put the cursor where you want the photo, then click "place inline".
That's what gwaithcoed did.