Please note: adding a 3rd lower titling is possible only when styling without captions. You can't use both - a 3rd lower title and captions in the same video.
1. Open the relevant video.
2. Click on Crop, Captions, Logo, Green replace and select Styling without captions.
3. Select the brush icon at the bottom and click on Theme.
4. Choose the 3rd lower titling that fits your brand and click on Save.
Pay attention: there are 3rd lower titles that last during all the video and called: "Full length" or simple 3rd lower titles that last a few sec. in the beginning
5. Now you can edit your 3rd lower title's information.
6. Click Next to apply the changes and continue styling your video.