Hello,
Sorry but we are not really sure to understand you... A product custom field to cancel order ?
Can you be more clear please for now impossible to be sure of what you needs.
Plus, Mohamed ask for a screenshot of your custom field configuration page...
One thing that I can already say, an option to cancel order from your account page BY customer themself, will required a custom developpement.
If you are haven't developer knowledge, contact one of
our partners
.
Awaiting news from you.
Regards