This page is designed for definition of test istruction.
See the image below:
Test instruction is entered in the single editing area on this page (data size is not limited, it’s an optional field). 
When you edit the text, “live spelling” is made and incorrect (or missing in the dictionary) words are marked by a red wavy line. To choose the correct choice of a word, right click on it and select correct value in the popup context menu.