Hi,
I want a popup window reminding users to do something based on the following conditions:
if something is typed in column A (can be any cells), but the corresponding cells in column C does not have any value. However, if the corresponding cell in column C have a value (or users first type a value in it before typing in column a, corresponding cell), there should n't be any pop up message.
Any idea on how to do this?
Thanks,
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