When I create a comment, the editor does not resize or scroll. Once I type beyond the text box, I cannot see what I am typing.
I believe scrollbars are controlled by CSS properties:
http://www.w3schools.com/cssref/pr_pos_overflow.asp
If you inspect element on a Confluence comment, you'll see overflow:hidden. You'll want to change this to overflow:scroll in the global stylesheet or space stylesheet within confluence.
https://confluence.atlassian.com/display/DOC/Styling+Confluence+with+CSS
Hope this helps!
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