You can set the following preferences in the 
		Font category of the 
		Preferences window. 
	 
To return to the default factory settings, choose 
		 in this window. Note that this resets the preferences in every category in the Preferences window. 
	 
 
		  Viewport 2.0 Font Size 
 
		 
		Select among the following sizes for the Viewport 2.0 fonts (for example, heads up display and annotations): 
		
 
		-  
			 Default Font Size 
			  
		  
- Medium Font Size (Maya 2010): Select this option to revert back to the font size used in Maya 2010. 
		  
- Custom Font Size: Select this option to use the sliders below to customize your font size. 
			 - Small UI Font Size: Use this attribute to set the viewport font size for the following items: 
				  - heads up display, with the exception of 
						Frame Rate and 
						Origin Axis 
					 
- joint labels 
					 
- IK handle labels 
					 
- camera UI 
					 
- polygon extrude tool 
					 
- Universal Manipulator 
					 
 
- UI Font Size: Items not listed above typically use this font size. 
				
 
Tip: If the font size does not update automatically, you can select any object in the scene view for the view to refresh.