Thanks for this - so I have followed the below - Youll notice a timeline at the top of the screen thats broken up by thin blue lines. In the center are two thicker black lines. These black lines determine which parts of the clip playback in slow motion. Drag them to the left or right to extend or shorted the slow motion effect, then tap the blue play button at the bottom of the screen to see your edits playback - but think I may have shortened it too much as the thicker black lines are gone and not sure how to get them back ?