The 3D preferences affect various aspects of working in the Motion 3D workspace.
General 3D
Display Inset View: A pop-up menu that sets when the Inset view (a temporary window that displays a camera view) appears in the Canvas. Inset View must be enabled in the View menu or View pop-up menu (in the upper-right corner of the Canvas) for the Inset view to appear. There are three menu items:
On Transform Change: Sets the Inset view to appear when adjusting an object’s transform parameters, such as position, rotation, or scale.
On All Changes: Sets the Inset view to appear when making adjustments specific to an object, such as adjusting the parameters of a replicator, in the HUD or Inspector.
Manually: Sets the Inset view to be displayed all the time.
Inset View Size: A slider that sets the size of the Inset view.
For more information, see Inset view.
Default New Group Type: A pop-up menu that specifies whether new groups are created in 2D or 3D mode. When set to Automatic, Motion determines the type of group that’s created based on the project. For example, when Automatic is selected and you are working in a 3D project, new groups are 3D. If you are working in a 2D project (no camera), new groups are 2D.
3D Grid
These controls let you modify settings for the grid that appears in the Motion 3D workspace.
3D Grid Spacing: A slider that specifies the spacing between grid lines, in pixels.
Primary Grid Color: Controls that set the color of the main grid lines. The main grid lines appear slightly heavier than the secondary grid lines.
Secondary Grid Color: Controls that set the color of the secondary grid lines (the lines that appear within the main grid lines).