Help, please

Anybody knows the answers to my following two questions? Please advise. I cannot move on without resolving these problems.

1) How can I change the minimum/maximum Y values so as to display more details?
2) Can I control the number and value of X-labels, for example, just display 3 x-labels - the start, the middle, and the end values?

Attached is the chart I got using jcharts.

Thanks in advance,

Jon




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