You can delete an interval during the process of creating your workout. This could be useful if you have added too many intervals or if you forgot to input "split into segments" to create blocks in your workout.
Here is a video that will show you how to delete intervals
To delete an interval, you need to start by marking the interval or intervals you want to delete. If you want to mark just one interval, you simply click it. If you want to mark more than one interval, you can select several intervals at once by clicking them while holding down the "ctrl"-key on your keyboard. Any intervals you click while holding down the "ctrl"-key will stay marked.
When your interval is marked, you will find delete on the right-hand side of the "toolbar".