Pop up on mobile is awkward when you stretch image

Hi there,

We are using your plugin to have our house floor plans open in a lightbox. However when we open the lightbox on a mobile device (specifically a phone) the floor plan opens in a lightbox however it’s a bit awkward.

Because the floor plans are so detailed we would like people to be able to stretch/zoom in on the image however when we do that the floor plan immediately shows us the top left corner of the floor plan and we can’t easily move the image around for us to see the rest of the zoomed in floor plan. When I try to move the image to see the rest of the floor plan if I lift my finger from the screen it will jump back to the top left corner of the enlarged floor plan.

Is there a way that it avoids jumping back to the top left and allows us to freely move around the enlarged image in the lightbox?

Thanks,
Tanya

The page I need help with: [log in to see the link]