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Hey, I just had an idea for a new undo/redo-function. I only created an
account for this mailing list to post my idea, I hope it gets recognized:

What about an slider instead of an undo- and redo-button? It should function
like this:
at the beginning, the slider is at its rightest position and cannot be
moved. When editing the document, the subdivision of the slider track will
be subdivided in one more part. For example, if you have typed a word,
inserted an image and typed another word, the slider could be moved
backwards three times. Moving the slider thump to the right side would be
fire the redo function. It would lead to one additional thing: every time
the user uses the undo function and then continues writing, the slider would
jump to the right side, the user would recognize and learn, that the undone
changes are lost, if he continues writing after reverting them. 

I think there three outstanding advantages:
1. A better user experience: The user no sees how many undo operations he
can do.
2. Easy to implement: I think replacing the two buttons with a slider and
registering a listener is not that difficul, since you use this listener to
activate/deactivate the buttons with the same one.
3. An unique selling point: nobody else has got something like this.

Of course, there is one disadvantage:
1. It uses more space.

In summary, I think we should give it a try.
I hope to hear from you, since this is my first try to get involved into
development of a bigger project. I'm an information technology student from
Constance/Germany, and I'm interested in improving the UX of LibreOffice.
Hope my first try will be noticed ;-)


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