Part-time hours with DaDaABC are essentially applying for extra hours on top of your contracted hours.
Say you don't want to set in stone that you're gonna work five days a week, you could set your contracted hours as just two days a week.
After doing this, you can then apply for an extra three days worth of hours.
…you won't be able to do this straight away. The option to apply for part-time hours is only valid once you have been in the job for around 1-2 months.
If the part-time hours tab doesn't appear in DaDaClass after a month, contact your co-ordinator and see if they can get it to appear.