Hi, here's an example
fig = figure();
subplot(2,1,1);
x = linspace(0,10);
y1 = sin(x);
plot(x,y1)
legend("ax_1");
subplot(2,1,2);
y2 = sin(5*x);
plot(x,y2)
legend("ax_2")
legH = findall(fig, "Type", "legend");
set(legH, "Interpreter", 'latex')
axesH = findall(fig, "Type", "axes");
set(axesH, "TickLabelInterpreter", 'latex')