How to stop this scrolling?

[Anne Wilson]

I never claimed to have wonderful mouse control, and every now and then I find 
that I have enabled scrolling, like an autocue.  I'm sitting in a KMail 
directory with a message containing log printout, and the d* thing is 
scrolling away slowly.  I can't stop it.  There has to be a way.  Let me into 
the secret?

Anne
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