Function: text-scale-mode

text-scale-mode is an interactive and byte-compiled function defined in face-remap.el.gz.

Signature

(text-scale-mode &optional ARG)

Documentation

Minor mode for displaying buffer text in a larger/smaller font.

This is a minor mode. If called interactively, toggle the Text-Scale mode mode. If the prefix argument is positive, enable the mode, and if it is zero or negative, disable the mode.

If called from Lisp, toggle the mode if ARG is toggle. Enable the mode if ARG is nil, omitted, or is a positive number. Disable the mode if ARG is a negative number.

To check whether the minor mode is enabled in the current buffer, evaluate text-scale-mode(var)/text-scale-mode(fun).

The mode's hook is called both when the mode is enabled and when it is disabled.

The amount of scaling is determined by the variable text-scale-mode-amount: one step scales the global default face size by the value of the variable text-scale-mode-step
(a negative amount shrinks the text).

The text-scale-increase, text-scale-decrease, and text-scale-set functions may be used to interactively modify the variable text-scale-mode-amount (they also enable or disable text-scale-mode(var)/text-scale-mode(fun) as necessary).

If text-scale-remap-header-line is non-nil, also change the font size of the header line.

Probably introduced at or before Emacs version 23.1.

Key Bindings

Source Code

;; Defined in /usr/src/emacs/lisp/face-remap.el.gz
(define-minor-mode text-scale-mode
  "Minor mode for displaying buffer text in a larger/smaller font.

The amount of scaling is determined by the variable
`text-scale-mode-amount': one step scales the global default
face size by the value of the variable `text-scale-mode-step'
\(a negative amount shrinks the text).

The `text-scale-increase', `text-scale-decrease', and
`text-scale-set' functions may be used to interactively modify
the variable `text-scale-mode-amount' (they also enable or
disable `text-scale-mode' as necessary).

If `text-scale-remap-header-line' is non-nil, also change
the font size of the header line."
  :lighter (" " text-scale-mode-lighter)
  (face-remap--clear-remappings)
  (setq text-scale-mode-lighter
	(format (if (>= text-scale-mode-amount 0) "+%d" "%d")
		text-scale-mode-amount))
  (when text-scale-mode
    (face-remap--remap-face 'default)
    (when text-scale-remap-header-line
      (face-remap--remap-face 'header-line)))
  (force-window-update (current-buffer)))