In PowerPoint you can use some nice shadow effects on images and shapes, but there is also a chance that you use contour shadows so the shadow can follow exactly the border of an image without counting the background. This can be really helpful for example to give a nice effect to the end slide.
For shapes, it is easy. You just need to pick the right shadow and that’s all. But the tricky part is for images and pictures. If you want to add a contour shadow in powerpoint pictures then you’d need to remove the background from the shadow. Here is an example. If we have a picture with a white background and want to remove it, we can do it by using the background removal tool in powerpoint.
Then we can use the crop tool to reduce the original image dimensions.
Finally, choose the right shadow to be used as a contour shadow. In this case we used Drop Shadow Rectangle which will work pretty well for the contour shadow.