If the image isn’t positioned correctly, you can easily move it inside the circle shape – or within any crop, for that matter. Because the aspect ratio is 1:1, the oval is actually a circle. This time use Crop to Shape and choose the oval shape. Now change the perfect square to a perfect circle by clicking the bottom of the Crop button again. This crops your image to a perfect square. On the Picture Tools Format tab, click the bottom of the Crop button and choose Aspect Ratio, 1:1. How did I not discover this before?! This method works in PowerPoint 20. The most common way to turn your rectangular picture into a perfect circle is to create a circle shape and fill it with an image. I came up with a quicker method earlier this week.
