# 三维对象

Opens the 3D Objects toolbar. The objects are three dimensional, with depth, illumination, and reflection. Each inserted object initially forms a 3D scene. You can press F3 to enter the scene. For these 3D objects, you can open the 3D Effects dialog to edit the properties.

## 立方体

Draws a filled cube where you drag in the slide. To draw a 3D rectangle, hold down Shift while you drag.

## 球体

Draws a filled sphere where you drag in the slide. To draw a spheroid, hold down Shift while you drag.

## 圆柱体

Draws a cylinder that is based on a circle where you drag in the slide. To draw a cylinder that is based on an oval, hold down Shift while you drag.

## 圆锥体

Draws a cone that is based on a circle where you drag in the slide. To draw a cone that is based on an oval, hold down Shift while you drag.

## 棱锥体

Draws a pyramid with a square base where you drag in the slide. To draw a pyramid with a rectangular base, hold down Shift while you drag. To define a different polygon for the base of the pyramid, open the 3D Effects dialog and click the Geometry tab. In the Segments area, enter the number of sides for the polygon in the box labeled Horizontal, and then click the green checkmark.

## 圆环面

Draws a ring-shaped object that is based on a circle where you drag in the slide. To draw a torus that is based on an oval, hold down Shift while you drag.

## 球壳

Draws a bowl-shaped object that is based on a circle where you drag in the slide. To draw a shell that is based on an oval, hold down Shift while you drag.

## 半球

Draws one half of a sphere where you drag in the slide. To draw a one half of a spheroid, hold down Shift while you drag.