Translation of verzerrt

Place the cursor (using the mouse) on the section which you want to delete. Hold down the 'Shift' key and press the 'PageDown' key or the bottom arrow key. The document should then be marked in blue.
In plural there is no difference between the formal and the colloquial address form. Do you mean that you are using 3rd person singular form for the plural imperative? If so, I will change all entries so far.
I understand your English, it's not bad at all. Yes, the English vocabulary is much larger than the German. The more you might spend time using the language, the better your vocabulary knowledge will become.