public _quality : String
Property (global); sets or retrieves the rendering quality used for a SWF file. Device fonts are always aliased and therefore are unaffected by the _quality property.
The _quality property can be set to the following values:
Note: Although you can specify this property for a Button object, it is actually a global property, and you can specify its value simply as _quality.
This example sets the rendering quality of a button named my_btn to LOW:
my_btn._quality = "LOW";