항상 궁금했던 opt in / out
opt to choose to take or not to take a particular course of action opt in (to sth) to choose to be part of a system or an agreement opt out (of sth) to choose not to take part in sth opt-out the act of choosing not to be involved in an aggrement After graduating she opted for a career in music Many workers opted to leave their jobs rather than take a pay cut. Employees may opt out of the company's pension plan
