By default, the transportation module of pre-and post-programs, which allows the users to decide to do not to pick a pre-or post-program is default at top of the page and all the available extension options.
The feature flags allow changing the poison to the button of the page, after all the available extension options.
Steps to change the position of the "No Pre-/Post-Extension" Module in Planner
Go to Settings
Click on Distribution Channels
Click on your TripBuilder ID
Scroll down on the Planner Tab to General Planner Features and Position of "No Pre-/Post-Extension"
By default and if disabled, users see the "no extension" option first on the step where users select pre- or post-extensions.
By enabling this flag, the "no extension" option is shown at the bottom of the page.