Originally Posted by tonoy
Although, I think bimg is used just to edit the width(help me out here Nasif Bhai).
That is correct. BIMG works by sizing to the width, and auto height to maintain aspect of the image.
After reading this thread, I figured I would simplify this for users even more. So, now you can use the new IMAGE tag to fit any image to forum width automatically. You don't need to specify size. Tag will figure out if your image is too wide for the forum and then resize accordingly. It will auto link to the actual image to open in a new window if clicked on the image.
I have also added tag icon as as well, so that you can use it by button click. Click on the button from the advanced editor (not on the quick post editor):