How do I create a situation file in X-Plane 11.5?

I've searched X-Plane Support website, X-Plane forum and the User Manual. The only discussion I'm able to find related to this topic addresses "How to automatically load a situation at start up. There's no discussion on how to create the situation file. I'd like to start a New Flight, pause it, and then save that situation. It was easy and obvious in X-Plane 9 & 10, but not so in 11.