Footer widget areas
Activate Main footer or Above footer widget areas
Go to: Theme Options → Global → Footer → Footer widgets. Choose the layout from the drop down list that you would like to use for the areas. Each column will now appear in Appearance → Widgets as its own widget area. Eg: Above Footer Column 3, or Footer Column 1. Add your widgets here.
When you select a layout for your widget area you will now see the option Columns convert. Select how you would like to optimize the column layout for tablets and phones.