In Animoto 3, you can add up to 10 text boxes over the course of a single block. You can add a Title, Subtitle, Quote, or Source Attribution text field. Title text fields also have the option of adding a subtitle underneath them.
To add a text box, click on the T icon on the side of the block, and select the kind of text box you want. Click the T icon again to add another text box. If the T icon doesn’t appear, that means you’ve reached the limit and can't add anymore to that block.