how to enlarge the font size in matlab R2013a help

I can't find a option in "preferences" to enlarge the font of Matlba R2013a help documentation.

Thank you

Answer 1

[Sean de Wolski]

ctrl + +

[AcidJazz da Silva Gazzana]

Thank you, the problem was solved !

Answer 2

[Azzi Abdelmalek]

Write in windows commande

preferences

[AcidJazz da Silva Gazzana]

Thank you, but in this version of Matlab R2013a there is not option to customize HTML text in the perferences-fonts-custom as in the previous version of Matlab.