Subtopics can be two, three, or more levels deep (as in ?topic,subtopic,subsubtopic,subsubsubtopic).

For a package export, both ?topic:-subtopic and ?topic[subtopic] can be used and invoke the same help as ?topic,subtopic.

Note: The recommended way to invoke help is to use the question mark.

When invoking help with the function call syntax help(topic), Maple keywords (reserved words) must be enclosed in backquotes or double quotes. For example, help(quit) causes a syntax error. Use help(`quit`) or help("quit") instead.

When using the question mark syntax for help, no quotes are required.

Commands entered in 1-D math, such as help, must end with a semicolon. You can enter multiple commands on one line, separated by semicolons or colons.

When using the question mark syntax, no semicolon is required, and there can be only one command on each line.

In contrast to the question mark syntax, help evaluates its arguments. For example, a:=int: help(a); opens the help page for 'int'. Use '' or "" quotes to prevent evaluation.

The double question mark (??) and triple question mark syntax (???) are for use in Command-line Maple. Using the double question mark syntax (??) causes the topic to display only the calling sequence and parameters. Using the triple question mark syntax (???) causes the topic to display only the Examples section.