The transition only applies to Tags. Once you have generated a voiceover and Tags, you will see this tab. Just click on “Advanced Editor”.
You will see the editor timeline; click on the Tag you want to add transition into and head to “Edit Tag Properties”. In tag Transition, you can choose from Dozens of transitions to add to your video.
If you want to add transitions to all the tags present in your video, make sure to select Random in Tag Transition and click on “Apply the same transition and Ken burns to all the tags in this track.”
Click on Save, and That’s it. You have your transition applied all over your video.