Lightbox popup window is a built-in feature of image elements in Elementor that allow the users to see an image popup window if they click on the image elements in your website.
This feature is automatically enabled for all image elements by default, but you can disable this feature for an Image element in your layout by following the steps below:
1. In Elementor, select the Image element you want to disable the Lightbox image popup window for it, so that a new dashboard on the left will emerge with the element's settings.
2. In Content tab, make sure the Link to option is set to Media File so that the Lightbox option will appear on the bottom.
3. Set it to No, in order to disable Lightbox for the Image element. If it is set to Default, the image element will follow the global settings for displaying the Image Lightbox.
Note: In order to change the default Image Lightbox settings globally for all the image elements in Elementor, you can refer to this article.