Hi Gwen,
Those customisations are not default theme settings, they have actually added those/developed them at their own cost likely by working with a developer.
1) They have a Row with a custom class set, the custom class references a background image. The image create the zigzag effect.
![](http://d.pr/i/14HpS+)
2) To center all contents, they have added one widget to the footer which is then fullwidth with all text aligned to center. You can do that in Theme Options => Footer Options.
3) That is custom jQuery, you’d need a developer to work with you to integrate that.
Thanks.