My understanding was that the most important usability issue was that  
the text for events close to each other would overlap (or not align  
anymore).
Hadrian

On Feb 4, 2008, at 10:51 AM, Alexander Nakhimovsky wrote:

> A vertical timeline would have several advantages:
>
>  1. Users much prefer vertical scrolling.
>
>  2. Labels would align with events instead of stretching over  
> unrelated time intervals.
>
>  3. The hierarchy of events in bands at different time scale could  
> be made visually clear.
>
>  4. Because of screen proportions,there is more horizontal space  
> than vertical space. The width of text components needs to be  
> constrained anyway, for usability reasons.
>
> From earlier discussion, it appears that the main concern was with  
> arrangement of labels in bands that get narrow as new bands are  
> added. Perhaps the number of vertical bands can be constrained, or  
> application creators can exercise self-control. Are there  
> significant technical issues in adding the VERTICAL option?
>
> Alexander Nakhimovsky
> Computer Science Department
> Colgate University Hamilton NY 13346
>  http://cs.colgate.edu/~sasha
> Director, Project Afghanistan
>   http://www.colgate.edu/projectafghanistan
>
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