Funny question on plotting the graph

I have this command;

clear
figure
x=5;
y1=0.9787;
y2=0.9743;
y3=0.9577;

plot(x,y1,'.','MarkerSize',15)

hold all

plot(x,y2,'*','MarkerSize',10)
plot(x,y3,'+', 'MarkerSize',10)

hleg1 = legend('Lenth', 'Dong', 'Berk & Picard',2);

set(hleg1,'FontSize',10)
set(hleg1,'FontAngle','italic')
xlabel('Size of active contrast')
ylabel('Power')
set(gca,'XTick',3:1:6)
str=['6s';'4s';'5s'];
set(gca,'XTickLabel',str,'fontname','symbol')

*however, seems that the font in the legend has be changed to the symbol too.How to change back to the original form? I want the legend to be at the same position. Is there any suggestion?

[Walter Roberson]

Why do you want fontname of symbol for the axes? What character are you trying to represent?