1. Newa project, import S15-125-03.dat in Samples' Import and Export subfolder.

2. Run LT script

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  plotbylabel iy:=((1,2),(1,3),(1,4)) group:=L template:=mgroups rows:=2 cols:=2 -d;

==> On dialog , the Group by combo was selected as “File Header“, which should be “Long Name“.