There's currently no direct textual input: I have considered it, but I feel it would be less efficient than the diagrammatic approach. Let me note that there is

There's currently no direct textual input: I have considered it, but I feel it would be less efficient than the diagrammatic approach. Let me note that there is full keyboard support, which can be faster than drawing the diagrams by hand: you can see the keyboard shortcuts from the "Shortcuts" toolbar button.