Customize tooltip text in line chart

[thathomas]

I have a table with three columns. When I create a line chart using Visualization options, it uses column1 as x-axis and column2 as y-axis. When I hover over the dots, it shows the text for the Y axis value. I would like to display column3 value when I hover over the dots. How can I do this?

[dural_yyz]

I have never seen the capability to make the hover value anything other than the original value.  If your third column is numeric in nature you could just use column 3 as an overlay value in your viz.