Each trip planner page has a toggle on the top right corner that can be turned On/Off. Turning the toggle On will expand all of the reservation content. Turning it off will collapse them.
Here is what the reservations will look like when they are collapsed (Off):
Here is what the reservations will look like when they are expanded (On):
You can set your default settings from your My Account page so that you can choose whether the Planner default settings are turned On or Off for any new trip you create.