Avoid empty hit areas
Hit areas are empty button clips with a shape defined in the hit state. These allow designers to reuse a single library of objects repeatedly by placing them over text objects and varying only the scripts used. The problem with this technique is that screen readers assume that if the contents of the up state of a button clip is empty, then it is not a button at all. The solution to this issue is simple. When a transparent movie clip is placed in the up state, screen readers will recognize the button and allow the user to activate it.
Assign keyboard shortcuts for most essential controls
In complex applications with multiple controls, it is helpful for users to navigate the application using keyboard shortcuts. For many users with mobility impairments, pressing keys may be difficult. Using keyboard shortcuts reduces the number of keystrokes required to perform important tasks.
Using the shortcut field in the Accessibility panel or the .shortcut property in ActionScript is not sufficient for this purpose. Creating a keyboard shortcut requires that a listener event be defined and a script associated with that listener. The shortcut field merely announces a shortcut value via Microsoft Active Accessibility (MSAA). It does not create the listener. Moreover, no screen readers support this feature in MSAA at this time.