...the 'fit all columns' functionality?
Hi, sorry for not greeting you people before.
I mean that command in which you click at the top-left "cell" (between A and 1, the point they would cross) and then double-click the separator between columns A and B. When done, all data in the current sheet will be used as limits to resize the columns sizes.

Is there a shortcut to do that without the mouse?

Thanks!