It’s not possible natively, but what you can do is have a workaround by creating a category for your service, for example “Massage”, and then inside of it you will have multiple services with different durations and pricing, like “Massage 1 hour”, “Massage 2 hours” etc…
![](http://192.241.254.135/wp-content/uploads/2019/05/Image-2019-05-14-at-8.29.41-AM-1024x455.png)
Then in “Settings -> Steps” you check “Show Service Categories” checkbox.
![](https://ticksy_attachments.s3.amazonaws.com/6472917110.png)
Then your services will appear in groups in the booking form