Remove Background Images in Printed Slides
Before printing your presentation slides, handouts, and notes, hide the background image to make it easier to read the printed pages.
Go to Design. In the Customize group, select Format Background to display the Format Background pane. In the Fill section, place a checkmark next to Hide Background Graphics. The background graphics disappear from each slide and the presentation can be printed without the background images. To toggle the background graphics back on, remove the checkmark next to Hide Background Graphics.
Print in Monochrome for Additional Clarity
Slides may be hard to read if you print them in a light color. Printing in grayscale or solid black shows only the text on a white background. This setting makes the slides easy to read and all the important content is still present.
To make this change, go to File > Print and select Grayscale or Pure Black and White, instead of Color.