PPT background image settings - where can I set it, can I introduce it?

PPT background settings can be customized color, you can also customize the picture. Specific settings can choose the menu "Format - background", you can also click the right mouse button in the slide blank - background. As shown in the figure.

Click on the background, the background appears to fill the following click on the inverted triangle menu, as shown below, select another color (M) can customize the solid color background; select the fill effect (F) can be gradient, texture, pattern, picture to do background filling.

Background image settings, click the fill effect, select the picture module. Click Select Picture to select the desired picture in your computer. Click OK.

The fill effect is shown below. Note the two options, Apply All to apply the background image to every slide, and click Apply to apply the background image to this slide only.