Multiple X Axis shown on graph

I have a graph with six scatter plots, each on their own y-axis, all sharing the same X axis. Because of this, the graph is pretty stretched and I only have one X axis at the bottom of the graph. Is there any way I can add the same X axis between the third and fourth graph? I don’t want it to be independent. I simply want a copy of the axis shown. All six plots should respond when a range is selected in any axis.