How do I change the size of the undo history?

How do I change the size of the undo history?

[Dan Anderson]

After like five or six undos Emacs stops undoing things and redoes
them.  Is there anything I can put in my .emacs to create a much longer
undo history?  Say of 1000 items?

Thanks in advance,

Dan

Re: How do I change the size of the undo history?

[roodwriter]

Dan Anderson wrote:

> After like five or six undos Emacs stops undoing things and redoes
> them.  Is there anything I can put in my .emacs to create a much longer
> undo history?  Say of 1000 items?
> 
> Thanks in advance,
> 
> Dan

Emacs doesn't number the undos. It keeps up to a certain amount of bytes in 
a buffer, regardless of the number of undos. In other words it keeps, say, 
30,000 bytes, whether that's one undo or 2,000.

There is an undo group in your Options > Customize Emacs menu. It gives you 
two limits. Just put in larger numbers. I put extra in mine because I have 
lots of RAM. You might have to experiment a bit to get a good number for 
the way you work.

--Rod

-- 
Author of "Linux for Non-Geeks--Clear-eyed Answered for Practical Consumers" 
and "Boring Stories from Uncle Rod." Both are available at 
http://www.rodwriterpublishing.com/index.html

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