To reformat a block of text that's in the wrong element -- in this example dialogue is formatted as action...
...simply touch the misformatted text to put the blinking cursor in it, touch the element indicator (where it says Action in the image above) and then touch the icon for the element it's supposed to be (Dialogue):
The paragraph will be reformatted:
NOTE: Final Draft has a reformatting tool that can do large sections of a script fairly quickly.
5100
https://fd.support/3WXa7b9