How to make formule bigger in org-mode of Emacs?

Question

I found Org-mode + LaTeX to be a very wonderful tool. How can I alter the scale of formula? Currently it is too small for me. I know how to scale the Emacs font (C-x+), but this does not work for LaTeX formulas.

How can make the LaTeX formulae bigger in Org-mode?

I have tired to change some parameters, but the problem still remains.

Thank you for your patience!

Answer 1

According to the documentation

or (info "(org) Previewing LaTeX fragments")

You can customize the variable `org-format-latex-options' to influence some aspects of the preview. In particular, the `:scale' (and for HTML export, `:html-scale') property can be used to adjust the size of the preview images. 

A quick C-hvorg-format-latex-optionsRET gives us:

org-format-latex-options is a variable defined in `org.el'. Its value is (:foreground default :background default :scale 1.0 :html-foreground "Black" :html-background "Transparent" :html-scale 1.0 :matchers              ("begin" "$1" "$" "$$" "\\(" "\\["))   Documentation: Options for creating images from LaTeX fragments. [snip] :scale       a scaling factor for the size of the images, to get more pixels [snip] 

For example, to set the scale to 2.0:

(setq org-format-latex-options (plist-put org-format-latex-options :scale 2.0))