Sizing legend in a png file

I am trying to resize the legend to cover only the bottom right corner of my figure. It looks good when I am running the code but it appears too large in the png file. What do you guys suggest in this situation? many thanks for your help.

[Rik]

This may have something to do with the renderer. Can you share example code that reproduces your issue?

[Dan Mirea]

legend('Force field','Starting point UAV1','Starting point UAV2','Target','Obstacle','UAV1','UAV2');
legend('Location','southeast')

% Defaults for this blog post
width = 3;     % Width in inches
height = 3;    % Height in inches
alw = 0.75;    % AxesLineWidth
fsz = 11;      % Fontsize
lw = 1.5;      % LineWidth
msz = 8;       % MarkerSize

% Set Tick Marks
set(gca,'XTick',-5:5);
set(gca,'YTick',-5:5);

% Here we preserve the size of the image when we save it.
set(gcf,'InvertHardcopy','on');
set(gcf,'PaperUnits', 'inches');
papersize = get(gcf, 'PaperSize');
left = (papersize(1)- width)/2;
bottom = (papersize(2)- height)/2;
myfiguresize = [left, bottom, width, height];
set(gcf,'PaperPosition', myfiguresize);

% Save the file as PNG
print('Sharing1','-dpng','-r300');

This is the code I am using to generate my legend and then the png file.

[Walter Roberson]

Your legend is being generated with a fixed font size and line width. Those do not refer to sizes relative to resolution: those refer to fixed sizes. Fontsize 11 is 11 points is 11/72 of an inch.

You are rendering the legend into an image with a somewhat small physical area. The legend has been defined to take up a large size relative to that small area.

With you using -r300 chances are good that you could have generated a perfectly readable legend with a smaller font size. Your current fontsize of 11 is 11/72*300 ~= 45 pixels, and your current linewidth of 1.5 is 1.5/72*300 ~= 6 pixels.

[Dan Mirea]

I did change the fontsize but the figure looks exactly the same including the legend. What approach would you recommend sir?