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### 14.11 Text Scale

To increase the height of the default face in the current buffer, type `C-x C-+` or `C-x C-=`. To decrease it, type `C-x C--`. To restore the default (global) face height, type `C-x C-0`. These keys are all bound to the same command, `text-scale-adjust`, which looks at the last key typed to determine which action to take.

The final key of these commands may be repeated without the leading `C-x`. For instance, `C-x C-= C-= C-=` increases the face height by three steps. Each step scales the text height by a factor of 1.2; to change this factor, customize the variable `text-scale-mode-step`. A numeric argument of 0 to the `text-scale-adjust` command restores the default height, the same as typing `C-x C-0`.

The commands `text-scale-increase` and `text-scale-decrease` increase or decrease the height of the default face, just like `C-x C-+` and `C-x C--` respectively. You may find it convenient to bind to these commands, rather than `text-scale-adjust`.

The command `text-scale-set` scales the height of the default face in the current buffer to an absolute level specified by its prefix argument.

The above commands automatically enable the minor mode `text-scale-mode` if the current font scaling is other than 1, and disable it otherwise.