I am presenting a figure of isotherms within a cross-section, however I am having trouble getting the x-axis aligned properly. I would like the end result to look as below (I achieved this using paint), where the zero value exists right at mid-section, and all the axis values increase/decrease from zero. As far as I have found, the axis always starts counting from an end point (default is the bottom-left corner). Is there a way to change this and achieve the desired appearance? It is worth noting that the cross-section is not a reasonable width (228.75 mm), which is why I am adopting this formatting style.
Thank you for your help.