Increase numbers by one in merged cells My question is very related to this https://discussions.apple.com/thread/3204532.

I just want to do the same but in merged cells, as in the picture below. Is it possible?

I see no fill handle here.
Fill handles do not operate with merged cells. You can use a formula to achieve the same effect.

Insert the following in these cells:


A1 (the merged cells A1 and A2)

1

A3 (the merged cells A3 and A4)

=A1+1



Copy and paste A3 for the rest of the column.

The following animation shows the entire procedure: