Command entry:Click or right-click the Point-Of-View (POV) viewport label. 
POV viewport label menu Extended Viewports ActiveShade
Creates an ActiveShade rendering that is "docked" in a viewport.
Only one ActiveShade rendering can be displayed at a time. If you try to display a floating ActiveShade window while an ActiveShade viewport is displayed, you get a message that asks whether you want to close the docked ActiveShade rendering, or stop the operation. If you go ahead and close the docked ActiveShade rendering, the viewport reverts to the view it previously showed.
When you right-click an ActiveShade viewport, the quad menu displays an ActiveShade menu. This menu contains a number of ActiveShade commands.
ActiveShade and Object Selection
If you select an object before you invoke ActiveShade, ActiveShade is done only for that object. This can greatly increase the speed of ActiveShade.
Similarly, once the ActiveShade window is open, the initialize and update steps (whether automatic or manual) are done only for the selected object.
In a "docked" ActiveShade viewport, you can select objects by right-clicking, turning on Select Object in the Tools (lower-right) quadrant of the quad menu, then clicking the object you want to select. In an ActiveShade viewport, only one object at a time can be selected.
To display the toolbar for the ActiveShade viewport:
The Spacebar toggles the toolbar display. In viewports, the toolbar is off by default.
(This is a main user interface shortcut, so the Keyboard Shortcut Override Toggle can be either on or off.)
The controls on the toolbar for an ActiveShade viewport are the same as for a floating ActiveShade window.
To change the ActiveShade viewport to another kind of viewport, do one of the following:
