Image: How to search, edit and use a image in Slideshow

Search:

1. Use the bing search as well
2. In the search tool look for 
• Wide image
• Large image

Adobe Photoshop

1. Select the image
2. Change the image size:
• Checked: Constrain properties
• Set the height and keep the width variable
3. Change the canvas size to desirable size
4. Use the Scale Transition tool to fit the image