Matt Huszagh <huszaghmatt@gmail.com> writes:

> I've created a patch to allow adjusting the scale factor used for inline
> latex image fragments. This involves a customizable variable that can
> either be set to a scale factor (defaults to 1.0) or a function that
> evaluates to a scale factor.
>
> This feature is in addition to the existing scale factor adjustment
> capability provided by `org-preview-latex-process-alist' through
> `:image-size-adjust'. Wherease image-size-adjust performs scaling at the
> time of image generation, the new change performs it during
> display. This can lead to significant time saving and suffers no loss of
> quality for vector graphics.
>
> As an example of use, I have several functions for changing frame
> scaling. I've added
>
> (if (eq major-mode 'org-mode)
>       (progn
>         (org-clear-latex-preview)
>         ;; 16 corresponds to the C-u C-u arg prefix.
>         (org-latex-preview 16)))
>
> to these functions so that changing the frame scaling also
> correspondingly changes the latex preview/fragment scaling to match the
> new size of the surrounding text. Because of this new feature, this
> change is effectively instantaneous for reasonably numbers of
> overlays. Obviously, something similar could be done for
> `text-scale-adjust' (e.g., through `advice-add').
>
> Feedback appreciated.

Apologies, the patch I sent is slightly wrong. The line numbers also
reflect an earlier patch I made. Here is a corrected version.