1- Images: upload/add your images from the WordPress media library with the ability to set the images size (Full or custom), zoom effect and overlay effect.

2- Title: The image gallery title.

3- Element extra class: Assign a css class to the image gallery (useful for custom css styles).

After adding the images a new tab (Responsive Options) will appear to customize the gallery columns for different devices and screens (Demo).

CSS Animation: You can animate the images by selecting the animation you would like.
CSS animation delay: The animation delay in (seconds) format EX: 0.25