tiff file dp1

running Octave 6.2, Windows 10

Have this code:

     figure (1);
     clf reset;
     semilogy(concs, DPX_DR_exog,'k-','LineWidth',2)
     xlim([0 7.5])
     ylim([1.e-6 1.0])
     hold on
     semilogy(concs,DPX_DR_endo,'k--','LineWidth',2)
     semilogy(concs,dG_DR_endo,'k:','LineWidth',2)
     semilogy(concs,dG_DR_exog,'k-.','LineWidth',2)
     xlabel('ppm formaldehyde')
     ylabel('DPX/DG adducts (pmol/mm^3)')
     set(0, "defaulttextfontname", "Helvetica")
     set(gca, "linewidth", 2, "fontsize", 18)
     print "-dtiff" "-r600" "Dosimetry_fig_4"

I think the print command in the last line should create a tiff file with
600 dpi resolution. The fiff file is created OK, but it has 96 dpi
resolution, when I check it's properties tag. The file size does increase
when I increase the -rNUM parameter, but the dpi stays at 96.

Your guidance will be appreciated!

- Rory