How to set the auto-generated number to a specific starting number?


I had received a Smartsheet form from someone who created it and transferred ownership to me. I am looking to set the auto-generated number field to a specific beginning number. Being new to Smartsheet, I am unsure how to do this? I am looking for the field in the form, but cannot find it. If can someone please guide me on how to do it, it would be much appreciated. Thank you!