If you're looking to include information for optional trip extensions within your itinerary, you can accomplish this within the Details tab of the itinerary creation flow.
Start by organizing base travel plans with correlating line items, as you would with any other proposal.
Once you get to the last line item (i.e. departure day):
- Add a new line item and choose Activity as the content type. Do not select a date.
- Write in: ~ Or, Optional Extension ~
- On the next line item(s), list out the trip extension details.
Here's how the optional extension will be presented on the Overview page:
Have fun creating beautiful content!