Under Content > Pages, select the region you wish to add the bar under. Click and select "Social Icons" under "Modules".

This will automatically open a dialogue box.

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Icon Sizes:

The default size for Full Icon Sizes is based on the area which they are being entered. This option allows you to shrink the icons by a certain percentage to allow them to fit better on the page you're adding them to. You should not need to adjust this unless you absolutely want to alter and widen the space between them images.

Adding Social Icons:

To add a Social Icon simply enter the FULL URL for your Social Media page into the appropriate field. This will automatically generate the icon with its embedded URL. 

When completed, click Okay, then save the page.