Any text block in wave.video can be split into multiple lines with different size, color, and decorations.
To add a line, select your text. If you're not sure how to create a text, please check this first. You can select your text simply by clicking on the timeline, or on the canvas:
Then find the “+T” button that appeared above your text line, click it to add a new line:
Now you have 2 text lines! Click on the new line to edit it:
To move a line alongside the canvas, just click on it and drag:
Useful articles about text: