When in Accessibility mode, to begin journey planning you first have to search for a place. Select an option from the search results. On the slider that appears, tap on the directions button.
You will then be asked to enter a location of where you want to journey plan from. This can be your current location or an alternative location that can be found by searching.
After entering your starting location, journey plan results will be displayed. There will also be filter options such as changing the date and time, setting journey preferences and changing the start and destination locations.
Tapping on a result will display a breakdown of the journey, as well as a link to view the departure board(s) for stop(s) that you need to take a service from.