XF 1.1 Add profile page

The "About" field already fills that role. That field can be edited on this page:

http://xenforo.com/community/account/personal-details

And it shows under the "Information" tab on the profile page.

It is possible to move that value to a new tab by editing the member_view template. For content that isn't a new page request you can refer to the default "Information" tab in the member_view template. Search for id="info" and #info to see the code for that tab. You can duplicate that code with a different id to create a new tab, then move the code for the "About" field to that tab.
 
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