Quite a different question in reality.
Well first you need to ensure your Used named range is dynamic to the extent it picks up new values as they are added, eg assuming numerics as implied:
With the above setup you can then apply your conditional rule, highlight range Sheet1!A1:DE104 (selecing A1 first) and apply a Formula based rule of:
as you add numeric values to Column A on Sheet2 so your matrix on Sheet1 should format accordingly.
Now I'm still not sure if that's what you want, ie:
Originally Posted by
Elegidos
=COUNTIF(used,A1)
if the above is true use same format for the adjacent cell (cell on the right)
is still rather vague given you refer to range A1:DE104... by "cell on the right" do you mean the entire row ? (ie if A1 matches a number in used range then format A1:DE1)
Regardless...
Conditional Formatting is regarded as being super volatile, ie used excessively it will probably cause some slowdown in terms of performance. For more info. see Volatile section on Charles Williams' site - link in my sig. (Volatility)
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