There are three ways of performing import operations:
Insert is used to add points to exiting points. The ordinal number of the points in the file to be imported is ignored and the new points are imported from the initial number entered in the dialog box.
It is the default option. Replace deletes all the drawing’s points and replaces them with the points imported.
Lastly, the Merge option considers point names and only adds points to the new file whose number no longer exists in the scatter plot.
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