I'm starting out with Xcode and I'm having a small problem. When click on an Item on the first list, it shows the content I want to, but it leaves a Space before the heading. I suppose the solution is pretty simple, but I can't figure it out. I hope somebody can help me out.

Hello, I'm just starting with Xcode and I was trying to learn with apples examples. I wanted to edit one off the example Apps to my liking but don't really know how to do so. In the App, the national parks are divided in three categories: Lakes, Mountains and Rivers. (see image) As of now to see all listed parks you would go to the list icon and see a list of all the parks. (see image) What I want to do is the following: When you click on the list Icon, you won't see all the listed parks, but a short list of the previously mentioned categories and by clicking on the list you'll see the parks in the chosen category. This is the program I'm using. https://developer.apple.com/tutorials/swiftui/interfacing-with-uikit I hope somebody can help me with this project. If you got any follow-up questions please let me know.