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A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

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Compilation mode turns each error message in the buffer into a hyperlink; you can move point to it and type RET, or click on it with the mouse (see Mouse References), to visit the locus of the error m…
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is the blank line at the very bottom of an Emacs frame. Emacs by default reserves that screen space for echoing keystrokes, error messages, complier messages, messages from background processes, and a…
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an Emacs presentation feature that alters the appearance of a buffer’s text on the screen, without changing the buffer content
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Starting Emacs in daemon mode
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GNU Project Debugger - Start it via `M-x gdb` to run the debugger on Ada, C, C++, Objective-C, Pascal, Fortran, Java and other languages.
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The generic concept of automatically saving information to the disk or to a remote server, triggered by a timer or any other event inside of Emacs.
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Question about making, using, and editing tables inside of Emacs.
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a built-in package that provides a web browser into Emacs.
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Calculator mode: Calculator major mode.
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An improved JavaScript mode for GNU Emacs that emulates many desirable features of IDEs.