* "Changed my tune": This means to alter your opinion or attitude, often due to a change in circumstances.
* "Changed my mind": This means to make a different decision or choice than you previously intended.
* "Changed hands": This refers to something, like property or a business, being transferred from one person to another.
* "Changed the game": This means to significantly alter the way something is done or the rules of a competition.
Could you please provide more context about how you heard the idiom "changed" used? This would help me understand which phrase you're referring to and give you a more accurate answer.