On Windows XP, open up an Explorer window, for example by pressing Start-e. Make sure you're in the "details" mode, where you see for each file its size, type, etc.
As you know, you can use the mouse to change the width of each column by dragging. You can make any column wider or narrower. My question is: How can you do the same thing using the keyboard?
Note: I'm not interested in emulating the mouse using the keyboard.