the Axes.bottom show mutiple line's title

[grace]

i want to let my lines which are link one by one,no overlap,just like these:

~~~ in my chart.but the problem is i had to realize every line has its x labels or x items and all they can zoom in or zoom out.not by mutiple axises.how to do it...[/img]

[Edu]

Hi Grace

Could you see, if the last post in your other topic answers your question. Or could you please tell us more about your problem.