MuPAD® helps you complete the names of known commands as you type them so that you can avoid spelling mistakes. Type the first few characters of the command name, and then press Ctrl+space. If there is exactly one name of a command that starts with these letters, MuPAD completes the command. If more than one name starts with the characters you typed, MuPAD displays a list of all names starting with those characters.
To get a brief description and acceptable syntax for a function, type the function name in a notebook and hover your cursor over the command.
For more detailed information, right-click the name of a command and select Help about from the context menu.