You can have the Windows taskbar or system tray visible while in Unity view.

Set the visibility of the taskbar by selecting View > Show Taskbar in Unity/Hide Taskbar in Unity.

Set the visibility of the system tray (notification area) by selecting View > Show System Tray in Unity/Hide System Tray in Unity.

When they are set to show, these elements also remain visible when you switch to work in non-Windows applications.