Hi delalou, if you wish to achieve this using letters, you can use this
script in the calculate event of the field you wish to display them.if
((Row1.index+1)/ 26 <= 1){ //Display a single letter if row index if
below Z String.fromCharCode(65+Row1.index); } else{ //Display double
digit letters up to ZZ (702 rows max) intFirstLetter =
Math.floor(Row1.index/26)-1; intSecondLetter = Row1.index%26;
String.fromCharCode(65+intFirstLetter, 65 + intSecondLetter); }I hope
this will help, don't hesitate t...