Argument: symbol
Key sequence: None
Displays a description (that is, value, property list, package, and so on) of symbol in a Help window. The symbol under the current point is offered as a default value for string . A prefix argument automatically causes this default value to be used.
Argument: symbol
Key sequence: None
Displays the documentation for the Lisp symbol symbol in a Help window (if any documentation exists).
Argument: function
Key sequence: +Ctrl+Shift+A
Displays the documentation for the Lisp function function in a Help window (if any documentation exists).
Argument: variable
Key sequence: +Ctrl+Shift+V
Displays the documentation for the Global Lisp variable variable in a Help window (if any documentation exists).
Argument: class
Key sequence: None
Displays the documentation for the Lisp class class in a Help window (if any documentation exists).