nearer the bottom on the left there is a green button- that expands and shrinks the 'quick reply' function... I've thought about moving it up closer several times but the difficulty has stopped me... it's doable, it will just take a bit to do it..
that same button is present several places, and it shrinks/expands where it's present...for instance, you can shrink the categories so only one (or all) or any variation are visible.
I'll be happy to move it if it's something you want?