Hi there,

I would like to force admins of a sheet to use a specific format when entering call signs.

The format should be following this pattern:

AA_0.0.0 Where (A) is an letter in capital, (_) a space, (0) a number from 0 to 9, (.) a dot.

How could I do this? Your help would be much appreciated!

I have Excel 2011 and 2013 on two different computers if it helps.

Thanks a lot for any help!

Fabrice