Would like to format font size in one column, according to a value in
another, e.g. if I have the data

A B
1 12 X
2 6 Y
3 16 X
4 9 Y
...

I would like the font size of the cells in column B to be the relevant
number in column A

(Going to use wingding arrows in B, but they won't display here)

Thanks,
Geoff.