I just find that box appearing and disappearing to be distracting; and when it's just sitting there , (for me) it has a cluttering effect. I'm sensitive to sensory overload (TV commercials drive me bananas when they jump up to a higher volume), and so I find clutter to be stressful (to varying degrees). I even aggravate myself when I forget to move the cursor out of the way after clicking the spot where I want to start typing. I can see how this might seem odd to "normal" people! [this text denotes 'grin']
Thanks for the explanation of "code folding". I'm not surprised that I overlooked something obvious! I will try to get this feature going to see how I like it.