Have YOU tried it?
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Regards,
RD
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Please keep all correspondence within the Group, so all may benefit!
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Juan_Pablo, if =A1 is in a cell and you want to copy it down:
1-Click the cell
2-Observe the Cell Pointer (black box around the cell). Specifically, note
that there is a little black box in the lower right corner of the Cell
Pointer. That's the Fill Handle.
3-Rest your mouse cursor on the Fill Handle. It will change from a big white
plus sign to a thin black plus sign.
4-Press and hold the left mouse button.
5-Drag your mouse as far down the column as you need to.
When you release the left mouse button, you'll see that =A1 has become =B1,
=C1, etc. as you dragged it down the column. This is because "A1" is a
relative cell reference.
When you have time, search the topic "About Cell and Range References" in
Excel help, and scroll down to the discussion of  Relative vs Absolute Cell
References.