Customization

You can simply use the included shortcode, and place the shortcode above all other content in the editor.

If this seems too manual, the other alternative is to use the template tag to position the gallery above your main content within your theme. You can literally place the gallery wherever you want.

Both the shortcode usage and template tag usage is outlined on the main plugin page here https://www.ads-software.com/plugins/easy-image-gallery/

Let me know if you have any further questions