Книга: Learning GNU Emacs, 3rd Edition
14.2 Help Commands
Emacs has many help commands, which are available as standard Emacs commands or as options to the C-h help key. They can be used to find information about commands, keystrokes, variables, modes, and various things about Emacs in general. The most basic help command is C-h C-h(help-for-help). C-h ? also invokes help-for-help. This command causes Emacs to open a *Help* buffer in a window with descriptions of all the help commands. You can type any one of these help keys, or, if you press Space, the *Help* window scrolls down as if you pressed C-v. Any other key aborts the whole process. If you scroll to the bottom of the help documentation, you can type a help key or any other key to abort.
The keys listed in the *Help* are those that, when appended to your help key, run Emacs help commands at any time. Help commands fall into two general categories: those that provide answers to specific questions and those that give general information about Emacs.
You will find the help commands in the former category to be invaluable after you have become comfortable with Emacs. Because it is so large and functionally rich, there will be times when you need to look up a detail such as a keystroke or command name or when you need to do something with Emacs that you don't know exactly how to do. As we've repeated again and again throughout this book, Emacs probably does what you want; you just need to figure out how. The help commands let you find these things out immediately, without leaving Emacs and without being a slave to your reference manual (or even this book).
Оглавление книги
- 11.3.4. BusyBox Commands
- Chapter 14. The Help System
- 14.2.2 Apropos Commands
- 14.3 Help with Complex Emacs Commands
- Table E-23. Help commands
- Table E-24. Documentation help commands
- Appendix F. Acknowledgments
- Using Man Pages
- Managing Printing Services
- Creating a Database in MySQL
- Deleting Database Users in PostgreSQL
- The MySQL Command-Line Client