Elegance has 3 Footer widgets:

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They are configured as you see below:

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Footer 1:

Drag a search widget into the Footer 1 widget area.

Then beneath that drag a custom menu widget.  Please keep in mind, if you want a specific menu here you will first need to create it in Appearance > Menus and give it a recognizable name.

Footer 2:

Drag a Testimonial Rotator widget into this area.  You will need to configure it as you see in the image below:

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Footer 3:

Drag a text widget into the Footer 3 widget area and add the shortcode for the Instaram Feed plugin.

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You will need to link your Instagram Feed with the plugin.  The plugin settings are listed in the WordPress menu on the left in your dashboard:

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Other Widget Areas, Page Templates & Plugins