Prefix to auto number

[barrowfordred]

I have a database with a field called "Drawing Number".
I can set it up so that the prefix "STD." always appears and then I type in the relevant number.
BUT I cannot figure out how to set up autonumber so that the "STD." appears and then the auto number is added????

 

[FoFa]

Autonumber is just that. You can always concatonate them when you need them however. "STD" & cstr([autonumbercolumn])