- Find an image for the foreground and use the PowerPoint format/remove-background function to get rid of the white background
- Find a background (nice image of Cafe de Flore by DarkB4Dwan)
- Combine the 2 images
- Blur the background with (click the image, format, artistic effects, the right one in the 2nd row)
One other application is to repeat a blurred version of a busy chart for additional comments (see post here)