GNU Hyperbole (pronounced Gnew Hi-per-bo-lee), or just Hyperbole, is like Markdown for hypertext, letting you use little or no markup in files to produce easy-to-navigate hypermedia files. It is an easy-to-use, yet powerful and programmable hypertextual information management system implemented as a GNU Emacs package. It offers rapid views and interlinking of all kinds of textual information, utilizing Emacs for editing. It can dramatically increase your productivity and greatly reduce the number of keyboard/mouse keys you'll need to work efficiently. Hyperbole lets you: 1. Quickly create hyperlink buttons either from the keyboard or by dragging between a source and destination window with a mouse button depressed. Later activate buttons by pressing/clicking on them or by giving the name of the button. 2. Activate many kinds of `implicit buttons' recognized by context within text buffers, e.g. URLs, grep output lines, and git commits. A single key or mouse button automatically does the right thing in dozens of contexts; just press and go. 3. Build outlines with multi-level numbered outline nodes, e.g. 1.4.8.6, that all renumber automatically as any node or tree is moved in the outline. Each node also has a permanent hyperlink anchor that you can reference from any other node; 4. Manage all your contacts quickly with hierarchical categories and embed hyperlinks within each entry. Or create an archive of documents with hierarchical entries and use the same search mechanism to quickly find any matching entry; 5. Use single keys to easily manage your Emacs windows or frames and quickly retrieve saved window and frame configurations; 6. Search for things in your current buffers, in a directory tree or across major web search engines with the touch of a few keys. The common thread in all these features is making retrieval, management and display of information fast and easy. That is Hyperbole's purpose. ---- See the "INSTALL" file for installation instructions and the "README.md" file for general information. There is no need to manually edit this file unless there are specific customizations you would like to make, such as whether a Hyperbole Action Mouse Key is bound to the middle mouse button. (See the call of the function, `hmouse-install', below). Other site-specific customizations belong in "hsettings.el".