Circling an object can add a tremendous cinematic impact to your footage. You can navigate a circle manually by maintaining the target in the middle as you fly sideways while yawing the opposite direction.
Be aware it takes a lot of training to fly a perfect circle manually. Luckily, you can take advantage of the Point of interest intelligent flight mode. In this mode, your drone will automatically circle at a smooth rate, during which you can quickly adjust height and radius. However, note that there’s no obstacle avoidance when flying sideways. So, you’ll need to tap pause in case of emergency.