The Releases Settings dropdown on Releases > Gantt includes two options:
Showing/Hiding shipped releases makes sense since a shipped release is date-bound, so a Gantt view can display it. But Show/Hide Parking lots does nothing, because PLs don't have release dates.
These two options appear a couple other places in the product (reports, roadmaps) where they both affect the user's view, but in this case the parking lot option is a little weird to include.
As a user, I would expect every setting option in a screen in Aha! to do something. Parking lot viewing will never do anything in a Gantt chart, so it will only confuse users. We should hide that option.
I would actually prefer that the "Show/Hid Parking lots" setting worked and when checked, it showed the parking lot items on the gantt chart. This will help me with visual management of parking lot items "horizontally" and not vertically which I can do from the Features Board.
Yes, I was confused why I chose "show parking lot" and nothing was happening.