How to use a customer editor to create something in the current unity directory

I'm not new to using Unity but I don't normally make custom parts for it. So my main question is how do you change the position of a new item. What I have now is [MenuItem("Assets/Create/Test")] but it shows up at the very bottom, how could I put it on top? Or part way through. What I want is to be able to go to my menu item and have it create a text file in that directory. I know how to make a text file but how do I get the directory?