BrainPort technology has been developed for use as a visual aid.
Hundreds of photos featuring her and the people she had met over the years served as a visual aid.
Nothing like a visual aid to get your point across.
As a visual aid, picture a rug on the floor.
For better or worse, audiences have gotten used to this visual aid.
The purpose of the visual aid is to enhance the presentation.
A user may place one or more guides on the image at any time and use it as a visual aid.
It is a way to synthesize information into a visual aid.
A short video adds another visual aid to understanding the various techniques.
Anyone would have needed that visual aid, because speeches rarely make good television.