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One of the keys Emacs refers to is the key LFD. For example, calc binds that key to calc-over. What key is this?

user17915
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zck
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1 Answers1

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LFD refers to "linefeed". This key is similar to return -- in ways not worth discussing here -- but can be input with C-j.

zck
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    C-j is the newline character, aka linefeed, abbreviated nowadays as LF, not LFD. See that wikipedia page for the relation between carriage return and linefeed (newline). – Drew Jan 11 '15 at 23:39