If no variable expansion characters are found in the string, the Volume
name will be formed from the {\bf format} string appended with the
- number of volumes in the pool plus one, which will be edited as four
+ a unique number that increases. If you do not remove volumes from the
+ pool, this number should be the number of volumes plus one, but this
+ is not guaranteed. The unique number will be edited as four
digits with leading zeros. For example, with a {\bf Label Format =
"File-"}, the first volumes will be named {\bf File-0001}, {\bf
File-0002}, ...