I'm not sure exactly what you are trying to do or what difficulty you are having.
Having data in columns
it should be easy to chart these as a single series by selecting the entire data range and inserting the chart. If you select the desired range and create the chart, then later add points to the data range, the chart should pick them right up.
Or are you talking about adding a bunch of points as different data series? The easiest way to add multiple series would use a sparsely populated range:
Of course, it might be as much work to arrange the data in this way so that you can add all the data series in one shot as it is to leave the data alone and add individual data series through the source data dialog.
A lot depends on exactly what you are trying to do.
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