Open image in a new window

I'm using 2.0. I created items by uploading a CSV file, where each item was linked to an image file (I used the URL for the image file, e.g., My issue is when you click on the thumbnail that's attached to the item, it just downloads the file from the dropbox location. Instead, I'd like it to open the original file in a new window. I'm a novice when it comes to PHP, but any help appreciated. Thanks!

I realized one problem was that my images were TIFFs, so I reloaded them as .pngs. Now when I click on them, they open, but in the same window. I've seen other Omeka-based sites where they open in a new window. If someone could please help me with this, I'd appreciate it. Thanks!

One way would be to modify the theme file items/show.php. Look for something like this


and change it to