In previous versions of SDL Tridion, you could add a logo to the Content Manager Explorer by updating the CSS (see [my example on TridionDeveloper][1]).

Specifically, you could add a `background-image` to these CSS selectors:

    .tridion .abouttridion .button,
    .tridion .abouttridion .button.mouseover,
    .tridion .abouttridion .button.mousedown

It looks like the .abouttridion class has been replaced with the personal information center.

I've left a comment on [SDL Documentation][2], but what element would you recommend for adding a logo-type image to the interface?

  [1]: http://www.tridiondeveloper.com/where-am-i-skinning-the-sdl-tridion-content-manager-explorer
  [2]: http://docs.sdl.com/LiveContent/content/en-US/SDL%20Tridion%20full%20documentation-v1/GUID-5E30FE46-721D-40EA-AB4D-DC96917EE306