Here is an example, taken directly from
Names Default To Here( 1 ); dt = Open( "$SAMPLE_DATA/Big Class.jmp" ); dt << Set Cell Height( 20 );
JMP does not have such an option. The row height can be changed, which will allow long strings to wrap within a cell, however, when you change one rows height, all rows will be changed to the same height.
Perhaps you could put the escape seequence '\!N" in your text?
dt = New Table( "Double Height", Add Rows( 1 ), New Column( "Column 1", Character, Nominal) ); Column(dt, "Column 1") = "The quick\!Nbrown fox";