Like clip art, photographs and other pictures can be added to a slide by choosing a Content Layout slide and clicking on the appropriate icon (for pictures it's the mountain icon).
An alternative to this method is to select the Insert tab on the ribbon and click on the Picture icon, as shown in the image at the top of this page.
An advantage of using this approach for either pictures or clip art is that you do not need to use one of the preset slide layouts containing a content icon to insert an image into your slide. The example shown in the following pages, inserts the picture into a Title slide layout.
Search Your Computer for the Photos
If you have made no changes to the settings in PowerPoint 2010 since the original install, PowerPoint will default to the My Pictures folder to look for your pictures. If this is where you have stored them, then select the correct picture and click on the Insert button.
If your pictures are located elsewhere on your computer, use the drop-down arrow at the end of the Look in box and find the folder containing your pictures.