Resize of inserted image - great feature

I really like the ability to resize an inserted image into the post - with the new program. I make a lot of charts. And sometimes, I feel that they are too big for space. With the new program, click on the image and a little dialogue box comes up with the option to resize. In the first box where it says "auto" for horizontal - just type in the new size such as "500px" then click "update" - and the image will appear resized. Great, great feature.