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Re: changing contrast and brightness on the fly

Ken Mankoff writes:
> I think brightness adjustment is achieved with alpha channels. May require
> IDL Object Graphics.  There are other ways. Search the groups.google.com
> archive for recent threads on this topic.
> IDL> ? cursor ; for your
> IDL> ? !mouse ; second question.

Uh, I don't think I would be recommending object 
graphics on the one hand, and the Cursor command (for
God's sake!) on the other!  

Stick with direct graphics in a draw widget 
*without* a Cursor command, is my advice. :-)



David Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438 E-Mail: davidf@dfanning.com
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