Select at least one data column and one factor column to create interaction plot by factors. In a Interaction plot, the number of rows and columns are both equal to the number of grouping variables(factors), each panel(except the diagonal panels) indicates the interaction of the row effect with the column effect.

When you select N factors, you will get N*N layers(cells). For the (N, M) cell, get the mean of data column by Nth and Mth factor. Then plot Mth factor in X direction against Y as line+symbol plot, Nth factor set to subset column. Note: Cell (N, M) and (M, N) share the same data in the result plot data sheet.