Using Labtalk property to set leading and trailing columns' designations and repeat designations in the middle. E.g.

• wks.colxy$=xy - set first column x, second y. It didn’t set designations further on so will be all Ys

• wks.colxy$=n(xy) - set first column as no designation, then repeat xy pair for remaining columns

• wks.colxy$=nl(xy)z - set first column as no designation, second column as label, last column z, the middle columns will repeat xy pairs.

See the table on Set Column Designation page for letters used to set designations e.g. E for y error, ….