How can I create a file if I've turned off the Project Tool? Let the Navigation Bar be your one-stop replacement for the Project Tool.
First, get to the target directory:
Activate the Navigation Bar with
Navigate -> Jump to Navigation Bar(
Use the cursor keys to get to the target directory
Speed search to select any subdirectories
Once your target is selected, use
Cmd-N for macOS) to bring up the new file dialog. Just like in
the Project Tool, the new file is opened after creation.
Also like the Project Tool, your selection doesn't have to be on a directory. If you're on a file, the new file will be created as a sibling. This is particularly useful in the common case of creating a new file in the current directory:
Activating the navigation bar higlights the current file
Quite simple: two key combos and you have a new sibling file, with no permanent file tree visible and no popups to close afterwards. That's what getting in the flow is about.