MATLAB: Editing a figure: How to scale fonts up and down

figure font sizerescale figure font size

I need to generate a 6×9 inch figure with 150 dpi. I also need the final fonts to be size 10pt using the Latex Interpreter. Ultimately this figure will be used in a Latex document.
My challenge is viewing and editing my figure in MATLAB. Obviously a 6×9 figure won't fit on a standard laptop screen, so I've been setting the figure to show on the screen as 3×4.5 inches.
I would like to be able to edit the figure with fonts that are scaled down so that I can see how they fit on the plot while still ending up with a final font size of 10pts.
Ultimately I'm going to be generating quite a few of these plots, so I need to be able to hard code this into my .m file as much as possible.
I've attached a MWE to illustrate my question:
if true
set(0,'defaultTextInterpreter','latex')
%Data
  x = [0:1:10];
  y1 = 5*x;
  y2 = 6*x;
  y3= 2*x;
%Save Figure Method 1
%save as 3x4.5 inch figure with resolution 300 dpi
%plan to double the size of my figure in the final latex document
  %Figure

      fig1=figure;
      set(fig1,'Position',[100,0,300,450])
  %The following commands prevent the axes from changing if the figure size is rescaled for printing

      ax1 = gca; 
      ax1.XTickMode = 'manual';
      ax1.YTickMode = 'manual';
      ax1.XLimMode = 'manual';
      ax1.YLimMode = 'manual';
  %Plot data

      plot(x,y1,x,y2,x,y3,'LineWidth',2)
      set(ax1,'FontSize',5)
  %Axes

      xlim([0,10])
      ylim([0,60])
      set(ax1, 'XTick', [0:1:10])
      set(ax1, 'YTick', [0:10:60])
  %Legend

      legendcaptions=[{'Line 1','Line 2','Line 3'}];
      leg1=legend(legendcaptions,'Location','northeast');
  %Title and Labels

      title({'Really Long Title Here: Okay on the Computer Screen','but likely not the accurate size in the final plot','since fonts dont scale linearly'})
      xlabel('x')
      ylabel('y')
  %Figure Properties

      fig1.PaperUnits = 'inches';
      fig1.PaperPosition = [0 0 900/300 1350/300]; 
      print(fig1,'-depsc','-r300','MME01')
%Save Figure Method 2
%save as 6x9 inch figure with resolution 150 dpi
  %Figure
      fig2=figure;
      set(fig2,'Position',[100,0,300,450]);
  %The following commands prevent the axes from changing if the figure size is rescaled for printing
      ax2 = gca; 
      ax2.XTickMode = 'manual';
      ax2.YTickMode = 'manual';
      ax2.XLimMode = 'manual';
      ax2.YLimMode = 'manual';
  %Plot data
      plot(x,y1,x,y2,x,y3,'LineWidth',2)
      set(ax2,'FontSize',10)
  %Axes
      set(ax2, 'XTick', [0:1:10])
      set(ax2, 'YTick', [0:10:60])
      xlim([0,10])
      ylim([0,60])
  %Legend
      legendcaptions=[{'Line 1','Line 2','Line 3'}];
      leg2=legend(legendcaptions,'Location','northeast');
  %Title and Labels
      title({'Really Long Title Here: Oversized on the Computer Screen','Fine in Final Plot'})
      xlabel('x')
      ylabel('y')
  %Figure Properties
      fig2.PaperUnits = 'inches';
      fig2.PaperPosition = [0 0 900/150 1350/150]; 
      print(fig2,'-depsc','-r150','MME02')
end
Any help would be greatly appreciated.

Best Answer

Thanks dpb for stating the obvious idea staring me right in the face. By scaling the line widths down in "Method 01" I get a figure that looks like "Method 2" in the final document but which also looks like a scaled down version in the MATLAB Figure GUI.
Here's the final working code. The only part of the code not scaling currently is the legend, but I imagine the solution to this is something similar.
if true
  set(0,'defaultTextInterpreter','latex')
%Data
  x = [0:1:10];
  y1 = 5*x;
  y2 = 6*x;
  y3= 2*x;
%Save Figure Method 1
%save as 3x4.5 inch figure with resolution 300 dpi
%plan to double the size of my figure in the final latex document
  %Figure3
      fig3=figure;
      set(fig3,'Position',[100,0,300,400])
  %The following commands prevent the axes from changing if the figure size is rescaled for printing
      ax3 = gca; 
      ax3.XTickMode = 'manual';
      ax3.YTickMode = 'manual';
      ax3.XLimMode = 'manual';
      ax3.YLimMode = 'manual';
  %Plot data
      plot(x,y1,x,y2,x,y3,'LineWidth',1)
      set(ax3,'FontSize',5)
  %Axes
      xlim([0,10])
      ylim([0,60])
      set(ax3, 'XTick', [0:1:10])
      set(ax3, 'YTick', [0:10:60])
      set(ax3, 'Linewidth', .25)
  %Legend
      legendcaptions=[{'Line 1','Line 2','Line 3'}];
      leg1=legend(legendcaptions,'Location','northeast');
  %Title and Labels
      title({'Really Long Title Here: Attempt at Cutting Line thickness in half'})
      xlabel('x')
      ylabel('y')
  %Figure Properties
      fig3.PaperUnits = 'inches';
      fig3.PaperPosition = [0 0 900/300 1200/300]; 
      print(fig3,'-depsc','-r300','MME03')
end
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