To increase/decrease the font:
PC: ctrl + / ctrl -
MAC: command + / command -
Authoring Tool Accessibility Guidelines (ATAG) 2.0 - (w3)
Jul 09, 2009
"This specification provides guidelines for designing Web content authoring tools that are more accessible for people with disabilities. An authoring tool that conforms to these guidelines will promote accessibility by providing an accessible user interface to authors with disabilities as well as by enabling, supporting, and promoting the production of accessible Web content by all authors. The Authoring Tool Accessibility Guidelines 2.0 (ATAG 2.0) is part of a series of accessibility guidelines published by the W3C Web Accessibility Initiative (WAI)."
http://www.w3.org/TR/ATAG20/