How to stop file name and columns from printing on graph?

I am plotting simple scatterplots with labels using gnuplot 4.4, my terminal is set to postscript. The graphs show up with "filename.txt using 1:2:3" in the upper right corner. (My command is 'plot filename.txt using 1:2:3 with labels'). How can I stop this from printing on my graph?

Thanks!!!