Nextgen gallery pop up image is not the same on the original image uploaded.

Hi guys .. i have uploaded an image dimension of width=”2909″ height=”1726″ but when I’m about to click it and goes to pop up form, the image is displayed in width=”396″ height=”235″. However, if i look on the image ( use google chrome inspect elements to check the image url if it is crop, it is the original image size ) the image rendered is the original image, but why the pop up page is too small. Is there a way to change the pop up form width size to adopt the image size ?

https://www.ads-software.com/plugins/nextgen-gallery/