Hi,
You must created the data validation list in the same
sheet and everytime you add more rows in this sheet, they
will make the validation list out of the validation range.
Exp: the validation list on row 100 to 105. If you add 5
more rows in this sheet, the validation list will be move
to row 106 to 110.
The better way to create the data validation list in
different worksheet.
1. In the new worksheet Create the company list in column.
2. Insert\Name\Define\Name in workbook, type the name you
decide exp: COMPANY\ Refers to: select the list\click ok
3. On the orginal workbook select the cell\go to Data
\Validation\select settings tab\
*in Allow choose list
*in Source type =COMPANY
*click OK
Now on the cell you just select, you will see the drop
down list of the COMPANY
Kim,