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From: acm@grendal.Sun.COM (Andrew MacRae)
Newsgroups: comp.cog-eng
Subject: Re: Multi-button mice (Re: Xerox sues Apple!)
Message-ID: <130148@sun.Eng.Sun.COM>
Date: 11 Jan 90 22:41:26 GMT
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In article <cZesptu00VsPQ2TvYm@andrew.cmu.edu> wjh+@andrew.cmu.edu (Fred Hansen) writes:
>Excerpts from netnews.comp.cog-eng: 9-Jan-90 Re: Multi-button mice (Re:
>.. Charles White@cadlab.UUC (193)
>
>> Why on earth would anyone implement a scrollbar that used more then one button?
>
>Because a click on one button does a page down operation toward the tail
>end of the document and a click on the other button does a page up
>operation to move toward the top of the  document.
>

In addition, it is very usefull to be able to click the middle button and
'zap' to the reletive position in the file.