If you move to the Detailed timer screen, you can check the start button for each sub timer. This can be used when you need an intermediate start, rather than starting from first timer.

You can change the sub timer configuration by clicking the Edit button. You can adjust the position by clickng the Up/down arrows for each sub timer. You can edit it by clikcing on the label or time. Then click Save to finish editing the timer routine. You can check the Use once option to set the timer to go off only once. The timer will automatically be deleted after it goes off.