Maybe, it would also be great if the column-handle could react in the same way as the window-handle works:
B3 to hide all other columns, B2 to show all and maximize the current column, B1 widen the current column.
I don't know whether it is even possible in current design, nor, if it is, how complicated the coding of these features would be.
Just an idea. I suspect also that it was already mentioned on 9fans.

Greetings,

++pac.