By default we try to keep the chart image whole on a single page. Cutting off image is not a good presentation and not what people usually look for, but if your scenario allows it, you can achieve this by making the page width, height smaller than the chart itself.
According to your inquiry, the chart looks overwhelmed with bars so you might want to decrease the number of XAxis labels and item Label when more data is plotted. This can be achieved by binding the chart through the NeedDataSource event and using the XAxis.LabelStep and item.Label properties to "filter" the data it shows.
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