Renaming Images: Simple Rename - The Bulk Rename Function - Bulk Rename Pattern Reference - Advanced Bulk Rename
Removing a prefix from the beginning of filenames
If you had files called img01234.jpg etc. and you want to remove the "img" prefix and leave the number, use the pattern:
<name:4:5>
If there is variable length data in the file name eg there are comments in the name already but it still has the prefix, use a very large number for the length to ensure the entire name is used
<name:4:999>
Adding a catalog number to the beginning of the name
If you add a 6 digit catalog number to the beginning of each filename to identify it, and you already have numbers up to 4560, you would use the pattern:
<auto:4561><name>
the first time then:
<auto><name>
for subsequent rename operations.
Reformatting dates
If you had files which were prefixed with the date they were shot in the format mm-dd-yyyy, but the files do not contain EXIF date information, you might want to reformat the date so that the files sort correctly.
You could use the pattern:
<name:7:4>-<name:1:2>-<name:4:2><name:11:999>
to reformat the date as yyyy-mm-dd and keep the rest of the name intact.