Lightbox Sizing Help

Hello All!

What is the best way to seet the size of the image that opens in a lightbox. Using the attached screenshot as an example, I’d like to make the photo open in full screen. Is there a way to make this reseolution dynamic depending on the browsers resolution? Thanks for your help!

As long as you have the image large enough it will fill the screen using the setting below. I find using a 1600px wide makes a nice viewing size at fairly small file size. You can use bigger if you want.