Open the Format menu and choose either Text Box or Placeholder .
The Format dialog box opens. (The dialog box will be labeled Format AutoShape or Format Text box, depending on the type of box you selected.) Click the Colors and Lines tab.
Text object backgrounds appear separately from overall slide backgrounds. Using the Format dialog box, you can edit the fill color to change the text box background. The dialog box uses a different name depending on the type of text box you edit. For example, if you edit a placeholder text box, a text box that is part of the original slide layout, the Format AutoShape dialog box appears. If you edit a text box you added to the slide layout, the Format Text Box dialog box appears. Both dialog boxes offer the same options for setting the text object's background color.
Use caution when applying colors behind your text. Slide text must be easy to read, so don't choose a text box background color that conflicts with the text color. Instead, choose a color that complements the text color.
Click the Color drop-down arrow.
Click a color, and click OK .
The background color is applied behind the text box.
Finding More Colors
To choose from a full palette of color options, click the More Colors option in the Color drop-down list in the Format dialog box. This opens the Colors dialog box; you can pick another color from the palette.
Setting the Slide Background Color
To change the entire slide's background, use the Background dialog box. See Part 6 to learn more about the various options for setting slide backgrounds.