The following settings are available for the Routes tab:

Show reverse buttons
When turned on, a reverse button is shown in each reversible route. When tapped, the reverse button opens the reverse of the original route.
This option is on by default.

Use station codes
When turned on, station codes will be used instead of full names (e.g. LDS instead of Leeds) in the route titles.
This option is on by default.

Secret bonus feature
You can reorder saved routes by pressing & holding them, then dragging them to where you want.