Change the bullet style in a list

If you're using one slide master, you can change the bullet style on the master and the change is reflected throughout the presentation. If you are using multiple slide masters, you must change the bullet style on each master.
1. On the View menu, point to Master, and then click Slide Master.
2. On the slide master, select the body text levels to which you want to apply the bullet style.
3. On the Format menu, click Bullets and Numbering, and then click the Bulleted tab. 
To change the bullet character. Do one of the following:
4. Click one of the bullet styles.
5. Click Customize to choose from a range of bullet characters and fonts in the Symbol dialog box.
6. Or Click Picture to choose a picture bullet from the Clip Organizer. In the Picture Bullet dialog box, click a picture, and click OK. To add one of your own pictures to this dialog box, click Import, select the file you want, and click Add.
7. If Clip Organizer is not installed on your computer, the Insert Picture dialog box appears when you click Picture in the Bullets and Numbering dialog box.
To Change the bullet size: Select a number in the Size box.
To Change the bullet color:
8. Click the arrow next to Color, and either select a color from the eight choices— which represent the current color scheme — or click More Colors for additional choices.
9. When you are finished, click save on the file menu.
10. On the Slide Master View toolbar, click Close Master View.

If, before you changed the master styles, you changed the bullet style on any slides in your presentation, those changes won't be affected by style changes to the master.