Add text to your iMovie project - Apple Support
support.apple.com › en-us › HT212141May 12, 2021 · To edit the text, tap the text in the viewer above the timeline, tap Edit, enter new text with the keyboard, then tap Done on the keyboard. To reposition the text, drag it to a new position. To resize the text, pinch the text to increase or decrease its size. To change font styles, tap the Font button or the Color button in the inspector.