Comment text field

I just left a comment for the first time, and I noticed that before "Sending"/"publish" it's not possible to shove the text up and down. If that is possible it would be cool. I went up to correct a typo. And then there was no way to scroll back down to the last word (hidden below the end of the little typing field/-window.) I had to go to the last word showing and add some periods to make the cursor go to the last lines below. Maybe it's possible to enable scrolling, would be super cool. ( I just realize it's not the case right now in this field while I'm typing this, but it just was, in a comment.....) :)