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### 21.2 Mouse Commands for Words and Lines

These variants of `mouse-1` select entire words or lines at a time. Emacs activates the region around the selected text, which is also copied to the kill ring.

`Double-mouse-1`

  Select the text around the word which you click on.

  Double-clicking on a character with symbol syntax (such as underscore, in C mode) selects the symbol surrounding that character. Double-clicking on a character with open- or close-parenthesis syntax selects the parenthetical grouping which that character starts or ends. Double-clicking on a character with string-delimiter syntax (such as a single-quote or double-quote in C) selects the string constant (Emacs uses heuristics to figure out whether that character is the beginning or the end of it).

`Double-Drag-mouse-1`

  Select the text you drag across, in the form of whole words.

`Triple-mouse-1`

  Select the line you click on.

`Triple-Drag-mouse-1`

  Select the text you drag across, in the form of whole lines.