You can lock a term prefix into the Look Up box so that you do not have to type it in each time. For example, look up "CDE Help," right click the mouse and select LOCK CDE HELP. Everything you type into Look Up will start after "CDE Help." To unlock the prefix, right click the mouse and select UNLOCK. You can still hypertext from term to term, and you can press Esc and type in any other term in the index. Whenever another term is looked up, the index will return to the locked prefix until it is unlocked.