You can add music to your video by clicking on the Add Files button to include a track of your choice. The music will be added to the Media Bin. Move your file to a separate audio track on the Timeline.
To add transitions, simply click on the Transitions tab on the left side and drag and drop the transition you like into the position you want in your movie. It’s best to put these transitions in between your video clips for a smooth transition.
If you’d like to add titles to your video, open the Titles tab on the left side and select the type you want. Drag and drop your titles on the Timeline.