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Did you ever see a compelling photo in a print publication that you wished you could see more of? Maybe you wish you could see what was just beyond the edge of the photo or maybe you wished you could zoom in to see the small details better. Well you can do both of those things with the Pan & Zoom overlay. Here I have the page in my document where I've placed a couple images of an art gallery, and it's a large photo. I don't want to fill the whole page, but I would like people to be able to see the detail of the photo and have the sort of fun experience of exploring past the edges of the photo and see what's beyond them. So this is a perfect use for Pan & Zoom.
You can use PNG or JPEG files with Pan & Zoom, but Adobe recommends JPEG, it's also worth noting the Pan & Zoom is not meant to work with images containing transparency. Also a static image called the poster is displayed before the user taps it to start the Pan & Zoom. If the image contains transparency, what will happen is the poster will show through the Pan & Zoom image and it won't look good. So here I have two different versions of the art gallery photo. I'll click on the one in the center and go to my Links panel, and I'll look at the Link Info here.
So this is placed at 72 pixels per inch and it's 1024x665. The one on the left is the same image, but it's at a higher size, 2000 pixels by 1298 and it's scaled down to 50%, so its effective resolution is 144 pixels per inch. Let's go to the Folio Overlays panel and there's only one simple control here in Pan & Zoom and that's On and Off, so it's turned on for both of these photos and let's preview.
So right now what we're seeing is the poster, the static image. If I tap it I start the Pan & Zoom overlay. Now I can drag around and see different parts of the photo. So basically everything that was cropped out of view in InDesign is now available to me by dragging around. With the Desktop Content Viewer Application, I can use the plus and minus keys on my keyboard to zoom in and out. Now with this image in the center, I can't zoom in anymore, because it's already at the minimum resolution, which is 72 pixels per inch, but I can zoom out of it by tapping the minus key and I can still drag to pan around.
Now let's try the one on the left. This was placed at 144 pixels per inch, so I'll tap the poster, and again, I can drag around and this time I can use the plus key on my keyboard to zoom in, and continue to pan around. To reset the Pan & Zoom overlay, I can double tap, and let's go back to InDesign and we'll try one more option. As I mention before the Pan & Zoom overlay has something called the poster which is the static image that's displayed before someone taps the overlay to activate it.
If I do nothing else what we see here we'll serve as the poster, but if I'd rather have another image serve as the poster I can just place it on top of the Pan & Zoom. So in this case I have a close-up of one of the paintings in the gallery that I'd like to serve as the poster. So all I have to do is drag it on top and I'll just hold Option or Alt and I'll drag again to cover this one, and we'll preview again. Now I see these posters and start the Pan & Zoom, and double tap to reset.
Now you might be thinking it'll be cool to have something like a nonrectangular viewing area and I would agree, but currently the view area must be a rectangular frame for Pan & Zoom overlays. Pan & Zoom overlays allow you to take images that have been cropped in InDesign and make the previously hidden parts of the image visible to the person viewing the folio. Depending on the starting resolution of your image, you can make the image appear larger or smaller within the frame. And finally, we saw how to cover Pan & Zoom Overlay with a separate static image that can serve as a poster when we don't want to use the image itself for that purpose.
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