It should let you zoom in when you click it. Is it not working?

Panel 1: Pacifica: So Dipper... I made you a Valentine or whatever...

Dipper: Really?

Pacifica: Yeah, but I only made it because I was bored, so don't read too much into it!

Panel 2: Dipper: No one's ever given me a Valentine before...

Pacifica: Really?

Panel 3: Dipper: Thanks Pacifica~!

Panel 4: Pacifica: You're welcome~