Variable: TeX-default-unit-for-image
TeX-default-unit-for-image is a customizable variable defined in
tex.el.
Value
"cm"
Documentation
Default unit when prompting for an image size.
Source Code
;; Defined in ~/.emacs.d/elpa/auctex-14.1.2/tex.el
(defcustom TeX-default-unit-for-image "cm"
"Default unit when prompting for an image size."
:group 'TeX-macro
:type '(choice (const "cm")
(const "in")
(const "\\linewidth")
(string :tag "Other")))