How to apply conditional data validation when a cell with a defined value is changed?
Web Applications Asked by screampuff on February 22, 2021
I have a spreadsheet that’s basically a grid checklist, let’s say 10 columns and 20 rows.
There are multiple cells that have N/A as the value, and I’m worried going through the checklist that one might accidentally be changed.
So I’d like to protect all cells that equal N/A and show a warning if that value is changed. However other cells that do not have N/A should not be validated.
Is this possible, without or with a script?
One Answer
without a script, you can set up data validation with a custom formula
=COUNTIF(A1,"=N/A")
and then copy A1 cell, select all cells in the grid and paste only data validation:
Answered by user0 on February 22, 2021
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