When doing Data Validation you select a range, the formulas will be
applied to the entire range based on the formula in the active cell,
which would normally be the first cell in the range.
Select Column B
Data, Validation, custom, formula is: .
Until you enter a correct value -- a number, if you hit "Retry"
you type over the selection; if you use "Cancel" button
you can start over as if you had done nothing.
When you create the validation there is additional
information that you can provide by choosing a tab
on that dialog.
Hi Tim
you have to apply the data -validation prior to entering data into the
cells. Applied after entering does not work. Excel will only re-check
after re-entering data in this cell
Select Column B with cell B1 as the active cell
Format, Conditional Formatting, formula is:
=AND(ROW()<>1,ISTEXT(B1)
choose format, use patterns tab to supply a background color
such as a pastel color.
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