You have to add a new column next to your Y data and set it as Label type (L). You can right-click to choose Set As.
Then you can right-click on this (L) column and open Set Column Values dialog to put in the formula "col(B)", assuming that is what your Y column is. By default, Recalculate is set to Auto so this new column will always contain the same value as your Y column.
Then you can select both the Y and the L column to plot a column plot.
We will make this simpler in our next service release, you will be able to just do the following:
1. Select A(x)B(y) to make column plot 2. enter the following LabTalk code layer -iL %C;