1 – First go to Extensions -> Templates -> Styles
2 – Then click on your yootheme default style (in the Default column the star must be yellow)
3 – Then click on open with builder
4 – Click on LAYOUT
5 – Click on FOOTER
6 – You should see a Grid your customized. (If not create one with the number of columns you want in your footer)
7 – Select the Item you want to change (here we want to change the second Item)
8 – Make your changes when you finish click Save
9 – Then click Close
10 – And finally Save
If you have more questions don’t hesitate to contact me !