How can I customize the User Dashboard (Frontend)

Question

I am working on 4.7 on Wordpress 4.6 and I trying to customize the User Dashboard in the Frontend shown for the request myURL.com/civicrm/?page=CiviCRM&q=civicrm%2Fuser&reset=1.

First I looked at the hook civicrm_dashboard and civicrm_summary, but those are used for different pages. It seems I can hook into that page with the hook civicrm_pageRun filtering for the page "CRM_Contact_Page_View_UserDashBoard".

1. How can I add content or modify content on the page object?
2. Where can I find documentation of the page object?
3. How would I change the HTML Table on the UserDasboard to DIVs to have separate tabs for Contributions, Events, Memberships, etc. ?