Practise drill for this unit.
Click on the bowl.
Addressing the mat.
When stepping on the mat to bowl:
* place the anchor foot on the mat about 50 - 100mm back from the front edge pointing
directly along the intended delivery line.
* place the lead foot adjacent and parallel to the anchor foot. ...
May I recommend the following 7 minute video. It features Jo Edwards and Shannon McIlroy demonstrating the basic bowling technique – grip, preshot routine, standing on the mat, delivery and follow through. It is well worth viewing multiple times.