[Design] Undo Use Cases

[Mimi Yin]

Philippe asked us to pull together a laundry list of use cases for  
undo. I've pulled together a first pass here: http:// 
wiki.osafoundation.org/bin/view/Journal/OneDotZeroUndoProposal

Please respond with your own use cases and/or anecdotes relating to  
Undo or questions about the wiki page.

Here is a high-level framing of how the use cases are organized...

Usage Patterns

Interaction Usage Patterns for Undo can be characterized in the  
following 3 ways. I think we want to support Undo for the first two,  
because they are relatively hard for users to restore manually  
through the UI. However, the 3rd usage pattern is easy to undo in the  
UI and therefore not worth supporting.

1. Spring cleaning: Moving items around. Creating new items. Filing,  
removing, deleting, cut, copying, pasting and duplicating

2. Making targetted edits on individual items: Addressing items,  
Editing titles, Labelling, Changing date/time information

3. Flipping switches: Stamping, marking as all-day, Never share this  
item, Setting recurrence rule, etc

Thanks!

Mimi
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