Why unitegallery images are zoomed bydefault?

How to solve the unitgallery images zooming problem? Bydefault it is zoom and images quality getting poor in screen.

Many people would have faced the zoom issue while using the unitgallery. Images get zoomed by default and image quality gets poor. You can solve this problem by setting up the below options and everything will be alright. 

slider_zoom_max_ratio: 2, 
slider_scale_mode: "fit", 
slider_zoom_step: 1.2