0 something that you are shown, such as a picture, film, or map, in order to help you understand or remember information
1 a picture, film, map, etc. designed to help people understand or remember particular information:
This used for the self-ratings a large (216r 279 mm) visual aid with lettering in a large (20 pt) bold font and two-step instructions.
Dashed lines are drawn as a visual aid only.
As a visual aid, a dotted line is drawn connecting the means for each hour.
In this case in general, the gap between the visual aid and camera image can be large.
Some type of visual aid would have certainly aided many of the volume's earlier essays, especially given the audience at which this is pitched.
Rayleigh line is its utility as a visual aid to remembering the multiplicity of cases which occur !
I am wearing in my lapel a small visual aid.
Note that lines are drawn as a visual aid only.!