If you are not already working with an existing 1D plot, first select New>1D statistics on the File menu. Select the Edit data command on the Edit menu to enter new data values or edit and/or delete existing values. You may edit an existing data group or create a new group.
Shortcut:
Click on the toolbar.
Page url:
https://www.dplot.com/help/index.htm?helpid_gs_1d_editdata.htm