To blur a picture in PowerPoint for your presentation design, follow these steps: 1. Insert the picture you want to blur into your PowerPoint slide.2. Select the picture and go to the “Format” tab.3. Click on the “Artistic Effects” option in the “Adjust” group.4. Choose the “Blur” effect from the available options.5. Adjust the intensity of the blur using the slider or by entering a specific value.6. Preview the blur effect on your picture and make any necessary adjustments.7. Once you are satisfied with the blur effect, save your PowerPoint presentation.