How to disiable navigation bar in openbravo 3

I would like to disable top navigation bar for certain users.

Quick Menus
Create New
Launch
Application Menu
Alerts
Log out
User Preferences
Help.

I would like to show only workspace with default widgets in it when certain users logs into openbravo.

How to achieve the above features in openbravo.

Any help greatly appreciated!.

Solution

It's possible to hide tool bar here via preferences. But Openbravo core customization is required to disiable top navigation bar in openbravo 3. It is not possible to achieve the above using openbravo's extended module feature. Check this link