These four commands are essential in presenting user friendly and user-proof dialogs in HotDocs. When designing systems, it is generally best practice to show only those variables that require (or may require) an answer and HIDE or GRAY those that are irrelevant. HotDocs provides a rudimentary manner to handle this automatically, but if you are designing complex systems, you may need to use these four commands.
All of these instructions are used in dialog scripts only.