Unfortunately these are custom add-ons which are coded by others, not myself or the admins here. I think the only place that works is when you're typing to send someone a private message, but even then if you start typing M16TA it won't recognize that you really mean MI6TA.
Sorry - I can't increase the size just because you have your coolpix camera's setting too high :lol: There's no need for images that big to be uploaded to a forum - if you use a tool like PLiska you can take images already on your computer and downsize them to a forum-appropriate size. The easiest solution would be to just downsize the coolpix image settings to a smaller size right on the camera's menu.