The In-Canvas View Control is a new feature added to AutoCAD® 2012, so it is also available in ACA 2012. When combined with the tools on the Navigation Bar and the ViewCube, you really do not need to tear off the View panel from the Home ribbon tab anymore.
Appearing at the top left corner of the drawing area on the Model "tab" (TILEMODE 1) and consuming a minimum of screen real estate, there are three text strings enclosed in square brackets; a left click on one of the strings gives access to popup menus related to that particular view control. The first string - either a "-" (one viewport displayed) or a "+" (multiple viewports displayed - allows you to control the visibility of the ViewCube, SteeringWheels and Navigation Bar as well as access to Viewport configurations, including any custom configurations you may have created.You can also temporarily maximize the currently active viewport and then restore the previous viewport configuration using this first menu.
The second string allows you to quickly select a Model View to restore, either preset or custom, as well as access to the View Manager. The name of the current View direction or Model Space View (if current) is displayed in the second string, for easy reference while you work.
The third string displays the name of the current Visual Style, and the menu allows you to set a different Visual Style current (predefined or custom) or to open the Visual Styles Manager.
The VPCONTROL System Variable controls the display of the In-Canvas View Controls. Set it to Off (0) to hide the controls. Set it to On (1) to display the controls. It is stored in the registry, so the setting will hold for all drawings.
With TILEMODE set to 0, you will not see the View Controls unless you maximize a viewport on a Layout "tab".