Quote Originally Posted by JJphoto
the picture looks smaller although I downsized to 800 Px wide,

In the Insert Image dialog, there's a Width field. In the old forum software, that field was blank by default, but now it's got a default value of 550 pixels. You can delete that value and leave the field blank, and your 800 pixel image will show at 800 pixels (or if it's wider, it will now automatically be resized, instead of cropped off like before).