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Re: Re: Undo in Mathematica

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  • Subject: [mg105069] Re: [mg105053] Re: Undo in Mathematica
  • From: John Fultz <jfultz at>
  • Date: Thu, 19 Nov 2009 07:25:39 -0500 (EST)
  • Reply-to: jfultz at

On Thu, 19 Nov 2009 05:23:42 -0500 (EST), David Bailey wrote:
> fd wrote:
>> All,
>> I was wondering if and how I could do any useful "undo" in
>> Mathematica. The one I get from the edit menu just allows me to undo
>> the last step (if it is not evaluated). This is pretty unsatisfactory,
>> even more for a program with this complexity.
>> I've tried navigating in the Option Inspector without luck, maybe
>> someone found something?
>> F.
> WRI claim that a general (multi-level) undo is impractical in notebooks
> because of the complexity of the environment and potential size of the
> files, but I would claim they could do a LOT better than the current
> scheme.

To set the record straight, WRI does not make that claim.

John Fultz
jfultz at
User Interface Group
Wolfram Research, Inc.

> For example, the could restrict the UNDO mechanism to cells that are not
> generated (i.e. not output), and possibly the undo stack would only go
> back as far as the previous evaluation.
> I would have thought a multi-level undo is pretty vital in an
> interactive program!
> David Bailey

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