> Crude and effective extension of the above:
>
> Or shade the cells with colour or fill of choice.
> Control-click allows multiple cells to be turned on and off 
> at a time.
> Control-click-drag allows areas to be selected to add to 
> individual cell clicking. This allows largish areas to be 
> highlighted in arbitrary manners.
> (Hold control before starting any clicking or strange 
> results can occur).
>
>
>   
Less crude and even more effective extention of the above: use 
conditional formatting to color the cells based on what is placed in 
them. Then use further formulas in the sheet to calculate the values you 
need to feed into your font array/file/whatever.

Though personally I tend to preffer to knock an app up in a RAD 
environment like delphi for this sort of thing.
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