[TxMt] Closing an open file in tab overflow?

How do I close a file that is open but that doesn't have a tab because too many other files are open with tabs? These are the files that appear when you click on the double-arrow to the right of the tabs. I keep clicking on the window's close button and closing all my files. (Grrr!)

Ideally, when I'm editing a file, its tab would appear at the top of the window, displacing some other tab, so that I have an X button to click and a clearer picture of what file I'm editing. I'm in a habit of looking at the tab for the name of the file, but it's only sometimes there. I know it's consistently in the window's title line; because it's usually in the tab, I'm not making a habit of looking at the title line.

Thanks for your help!

~joe