[Help Wordpress] Prevent FullScreen from stretching images.

First let me say that your plugin and work are incredible! This is by far the best WP slider plugin I've bought and used. (I've tried SlideDeck2, RevolutionSlider, NivoSlider, WooSlider).

I'm need to prevent my images from stretching (beyond their original size) when in Full Screen mode. I see in the demo that when in full screen, the images center and stay true to the original image size. I may be overlooking a simple setting, but I've been through them several times and have yet to fix it.

The attached screenshot is 1600px wide, when the uploaded image is only 960px. Shouldn't it automatically stay at that width and not stretch?

thanks

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help.dimsemenov.com