Difference between revisions of "Registers"

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Emacs registers are compartments where you can save text, rectangles, positions, and other things for later use. Once you save text or a rectangle in a register, you can copy it into the buffer once, or many times; once you save a position in a register, you can jump back to that position once, or many times.
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== Naming convention ==
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There are 62 registers, each with a single character for a name:
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* from a to z
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* from A to Z, different from a to z
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* from 0 to 9
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== Functions ==
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A register can store a position, a piece of text, a rectangle, a number, a window configuration, or a file name, but only one thing at any given time. Whatever you store in a register remains there until you store something else in that register.
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== How to use ==
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{| class="wikitable"
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|-
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! Type
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! How to save
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! How to use
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! Other useful command
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|-
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|Position
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|C-x r <SPC> '''r'''
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|''jump:'' C-x r j '''r'''
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|
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|-
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|Text
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|C-x r s '''r'''
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|''insert:'' C-x r i '''r'''
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| m-x append-toregister <RET> '''r'''; m-x prepend-to-register <RET> '''r'''
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|-
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|Rectangle
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|C-x r r '''r'''
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|''insert:'' C-x r i '''r'''
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|
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|-
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|Window Config
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|C-x r w '''r'''
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|''restore:'' C-x r j '''r'''
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|''save all frame's window:'' C-x r f '''r'''
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|-
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|Number
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|C-u number C-x r n '''r'''
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|''insert:'' C-x r i '''r'''
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|''increment:'' C-x r + '''r'''
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|-
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| File
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| (set-register ?z '(fine . name))
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| ''jump:'' C-x r j '''r'''
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|
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|}
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* To see what register r contains, use M-x view-register
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* To visualize what register r contains with helm you can M-x [https://tuhdo.github.io/helm-intro.html#sec-19 helm-register]
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== Bookmark ==
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[[Bookmarks]] can be thought as register with a long name and surviving between Emacs session.
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[[Category:Text Editing]]

Latest revision as of 19:19, 1 November 2014

Emacs registers are compartments where you can save text, rectangles, positions, and other things for later use. Once you save text or a rectangle in a register, you can copy it into the buffer once, or many times; once you save a position in a register, you can jump back to that position once, or many times.

Naming convention

There are 62 registers, each with a single character for a name:

  • from a to z
  • from A to Z, different from a to z
  • from 0 to 9

Functions

A register can store a position, a piece of text, a rectangle, a number, a window configuration, or a file name, but only one thing at any given time. Whatever you store in a register remains there until you store something else in that register.

How to use

Type How to save How to use Other useful command
Position C-x r <SPC> r jump: C-x r j r
Text C-x r s r insert: C-x r i r m-x append-toregister <RET> r; m-x prepend-to-register <RET> r
Rectangle C-x r r r insert: C-x r i r
Window Config C-x r w r restore: C-x r j r save all frame's window: C-x r f r
Number C-u number C-x r n r insert: C-x r i r increment: C-x r + r
File (set-register ?z '(fine . name)) jump: C-x r j r
  • To see what register r contains, use M-x view-register
  • To visualize what register r contains with helm you can M-x helm-register

Bookmark

Bookmarks can be thought as register with a long name and surviving between Emacs session.

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