Plotting y on x from columns not adjacent

To plot y on x, I highlighted the column that I wanted as x, then pressed ‘command’ before highlighting the column that I wanted as y. I always get x as the y. I tried using the CTRL key, but when I depressed the CTRL key, I could not highlight the desired column. What do I do?

The ‘Chart Wizard’ won’t know in what order you selected the columns. It will take for ‘X’ the column more to the left. You may accept this for a moment and then manually edit the ‘Data Series’.