Difference between revisions of "Registers"
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Revision as of 14:52, 28 March 2012
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.
Each register has a name that consists of a single character, which we will denote by r; r can be a letter (such as ‘a’) or a number (such as ‘1’); case matters, so register ‘a’ is not the same as register ‘A’.
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. To see what register r contains, use M-x view-register
- Position: Saving positions in registers.
- Text: Saving text in registers.
- Rectangle: Saving rectangles in registers.
- Configurations: Saving window configurations in registers.
- Numbers: Numbers in registers.
- Files: File names in registers.
- Bookmarks: Bookmarks are like registers, but persistent.