How do I allow my drivers to choose which job to take?

To allow your drivers to choose jobs:

Go to AdminConfiguration
Click on the first option, Driver App Settings.
Set Allow Start Job for Unallocated Rides in Queue to Allow
Set Show in Live Queue Unallocated Future Bookings in to for example 1 month
Don't forget to save the updated configuration by clicking Update Configuration on the bottom of the page!

In the driver app, your drivers can click on Live queue to see all jobs, and then choose which one to allocate to himself.