hey guys, i've been having a hell of a time trying to figure this out: how do you make a chart in numbers that has multiple series listed on the y-axis. in other words, how can i make a line chart using data from two columns and have the left side of the chart's scale correspond to one column and vice versa for the right side, all on the same chart? i know there's gotta be a way to do it, but for the life of me i can't figure it out. any help would be greatly appreciated. thanks!