... but can't seem to get the values of the X axis to appear at the bottom of the graph. Instead, they appear smack dab in the middle of the graph....
You most likely have negative values in the data. An example:
[TABLE="width: 256"]
<tbody>[TR]
[TD="class: xl64, width: 64"][/TD]
[TD="class: xl64, width: 64"]Alpha[/TD]
[TD="class: xl64, width: 64"]Beta[/TD]
[TD="class: xl64, width: 64"]Gamma[/TD]
[/TR]
[TR]
[TD="class: xl64"]Q1[/TD]
[TD="class: xl64, align: right"]2[/TD]
[TD="class: xl64, align: right"]-1[/TD]
[TD="class: xl64, align: right"]1[/TD]
[/TR]
[TR]
[TD="class: xl64"]Q2[/TD]
[TD="class: xl64, align: right"]1[/TD]
[TD="class: xl64, align: right"]0[/TD]
[TD="class: xl64, align: right"]-2[/TD]
[/TR]
[TR]
[TD="class: xl64"]Q3[/TD]
[TD="class: xl64, align: right"]0[/TD]
[TD="class: xl64, align: right"]1[/TD]
[TD="class: xl64, align: right"]-2[/TD]
[/TR]
[TR]
[TD="class: xl64"]Q4[/TD]
[TD="class: xl64, align: right"]-1[/TD]
[TD="class: xl64, align: right"]2[/TD]
[TD="class: xl64, align: right"]1[/TD]
[/TR]
</tbody>[/TABLE]
Plots like this, by default:
If you have a fixed limit vertical axis,
Select the vertical or y-axis.
In the format pane, select the small icon that looks like a column chart.
Under Axis Options, in the section headed "Horizontal axis crosses", select the "Axis value" radio button.
Type in the y-value where you want the x-axis to cross. In my example, I entered -3.
You can move just the labels.
Select the horizontal or x-axis.
In the format pane, select the small icon that looks like a column chart.
In the section titled "Labels", change "Label Position" to "Low".