를 보면

when you see; looking at

→ 를
phrase Rare #27,242
when you see; looking at The object particle 를 attaches to the thing being seen; 보면 means “if/when [someone] sees.”
KO: 춤추는 발레리나를 보면 무섭지 않았어요.
EN: I wasn’t scared when I saw the dancing ballerina.

헨리를 보면 바로 나 한테 전화하라고 해, 중요해

If you see Henry, tell him to call me right away. It’s important.

— 좋은 친구들 (1990)

그 슈트를 보면 그게 아닌데?

If you look at that suit, isn't that it?

— 데드풀과 울버린 (2024)

춤추는 발레리나를 보면 무섭지 않았지

You weren't scared when you saw the ballerina dancing, were you?

— 폭풍의 시간 (2018)