I had a custom-set-faces that I had used in an emacs startup file that was especially for when I launched latex files but I'm in the process of merging and updating my .emacs file so I don't launch a seperate start-up process for the latex file. I want to set it so this custom face is set only when latex mode is on. Since it is a custom face I don't think it is wise to set a LaTeX-mode-hook but I know there should be a way to do this. I only change the font and the text size basically for when I'm typing. I would also like this enabled for text-mode if possible. Attache the custom face below.
(custom-set-faces
;; custom-set-faces was added by Custom.
;; If you edit it by hand, you could mess it up, so be careful.
;; Your init file should contain only one such instance.
;; If there is more than one, they won't work right.
'(default ((t (:inherit nil :stipple nil :background "white" :foreground "black" :inverse-video nil :box nil :strike-through nil :overline nil :underline nil :slant normal :weight normal :height 98 :width normal :foundry "unknown" :family "DejaVu Sans")))))