Plotting Symbols

[Kieran Ames]

Hi again,
Could someone please give me a quick overview on the use of symbols for
identifying points?
The shape file I'm using has a text field in its .dbf that is a
Yes/No/Other flag. ("Y", "N", and blank).
How might I plot these points as symbols based on the contents of this
flag field so that users could tell the difference when the data is put
onto the gif output?

Thanks much to all.

Kieran