change (one's) tune

Translations
сменить тон
After realizing the benefits, he changed his tune about the new policy.
Осознав преимущества, он сменил тон по поводу новой политики.
Definitions
To change one's attitude, opinion, or approach, often in response to new information or circumstances.
Words
change

verb
изменить
one's

pronoun
свой
tune

noun
тон