Adobe ACROBAT 3D Manual page 568

Changing 3D preferences
In the 3D panel of the Preferences dialog box, you can determine whether the 3D toolbar
and Model Tree are displayed by default. You can also specify a default renderer and
determine whether animations are allowed.
Preferred Renderer
The rendering engine affects both performance and quality, so it's important to select the
appropriate renderer. Depending on your system, you may want to change your render
engine. For Windows XP, you can select DirectX 8, DirectX 9, or Software. For Mac OS
10.3 or later, you can select OpenGL or Software. If you select a DirectX or OpenGL
option, all rendering takes place using the graphics chip on the video card. If Software is
selected, rendering may take more time, but the performance may be more consistent with
the original model's.
Open Model Tree On 3D Activation
Determines whether the Model Tree is displayed when the 3D model is activated. Choose
Use 3D Content's Setting to use whichever setting the author used when adding the 3D
model to the PDF document.
Default Toolbar State
Determines whether the 3D toolbar is displayed or hidden when a 3D model is activated.
Enable Toggle For 3D Toolbar Control
Displays a button on the 3D model that lets you hide or display the 3D toolbar.
Enable Double-Sided Rendering
Some model parts have two sides. To save time and space, you can deselect this option to
render only the side facing the user. If the user looks inside a part rendered with only one
side, the back side would be invisible.
Enable Camera Animations
Some 3D models include animations enabled by JavaScript. Deselect this option to
prevent 3D animation.
Enable 3D Selection For The Hand Tool
Lets the user select and highlight parts of the 3D model using the Hand Tool. If this option
is not selected, use the Object Data Tool (Tools > Object Data > Object Data Tool) to
select the object.
Consolidate 3D Tools On The 3D Toolbar
Selecting this option places the manipulation and navigation tools under the Rotate Tool,
thereby shortening the 3D toolbar.