I have searched for this and tried different techniques out but nothing works like I want it to. I want a time stamp displayed when a certain cell is changed but only when things are actually changed. The ones that work so far will update the time even when the cell is double clicked to enter text. That won't really work because I know that cells will be clicked on and updated with nothing changed and that messes up when the cell was actually last changed.
Here is one forumula that does works but changes when a cell is clicked to enter text but nothing actually changes.
=IF(C3<>"",IF(B3="",NOW(),B3),"")
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