ALM 11.52. Want to add a custom button next to or below of 'Logout' button

Hi,

I'm trying to add a custom button next to or below 'Logout' button. This button will be common to all modules and upon click of this button a new webpage will open.  I know custom button can be added at Toolbars for defects, test plans etc..But here we want something which is common to all modules and is part of main header.

Any help in this regard is much appreciated.

Thanks!