Setting Up
Naming Scheme
OptionalSet the naming pattern for output files. Use a custom prefix and the {number} token to include an auto-incrementing counter in each filename.

The Naming Scheme panel — enter a pattern in the Photo Naming Pattern field.
Pattern tokens
{number}included in patternInserts a zero-padded 4-digit counter. For example, a pattern of IPH_{number} produces IPH_0001, IPH_0002, and so on.
omittedno token in patternThe counter is appended automatically. A pattern of IPH still produces IPH_0001.
The counter resets to 0001 at the start of each new session.