From Longman Business Dictionary
customizecus·tom·ize /ˈkʌstəmaɪz/ (also customise British EnglishBrE) verb [transitiveT usually passive]MANUFACTURING if something is customized for a customer, it is designed, built etc specially for that customer, making it different to other things of the same kindWe provide both standard and customized training schemes.
The menu makes the software easy to customize.