[Plugin Next Gen] is this possible…

I’m using Next Gen image gallery and I’m displaying direct mail templates through it. I have got it all working fine but I was curious if there was a way to add a link in maybe the corner of the picture to say “View other side” and then when you click on it it will show the back side of the mailer. If not is there another plugin that might suit my needs better?

Just a warning, I’m not amazing at wordpress so please try and state your answer in detail.