Select a block you’d like to add voice-over to. You’ll see a small icon, second from the left, that looks like a microphone. When you click on it, you’ll find a button labeled RECORD. Click and hold down on that button; then start talking to add your voice-over.
After you click RECORD, you’ll see a notice telling you that you’re recording, along with a timer counting up. Try to match up your voice-over to the timing of your block. You can find out exactly how many seconds your block lasts by checking the number to the left of the voice-over icon.
When you’ve finished recording, you can play back your voice-over, delete it, or re-record it. Once you’re happy with your recording, you can add voice-over to other blocks in your video, or preview your whole video to hear your voice-over in action.
Before you hit the record button, take a look at a few of the ways you can get your voice-over to sound its best.