Your social networks links can be managed in the
Social networks section of the theme options page.
By inserting the direct links to your social profiles (by the way, mind to insert the full links, not just the username), the corresponding services will be available to be selected in the social areas of the
Header Bar and the
Concerning both controls, after you’ve selected the social networks you want to display in each area, you’ll be able to rearrange their order by dragging them one before the other.