How do I shrink an image size?

You can tap the Resize Icon in Edit Image screen to shrink an image. You can shrink a 50M image to 16M, 8M, or 3M, a 20M image to 16M, 8M, or 3M, a 16M image to 8M, or 3M and an 8M image to 3M. Images smaller than 3M and panoramic images cannot be shrunk and thus the Resize icon is grayed out.