q=gda(); /// \sleftarrow{\normalfont get the default axes }
q.thickness=2; /// \sleftarrow{\normalfont default line thickness to \verb+2+ }
q.grid=[4,4];/// \sleftarrow{\normalfont I want a grid on my plot }
q.font_size=4;/// \sleftarrow{\normalfont increase default font size}
x=(0:0.1:2*%pi)';
plot2d(x,sin(x),rect=[0,-2,2*%pi,2]);
xdel();
sda(); /// \sleftarrow{\normalfont reset the default axes to default values }
plot2d(x,sin(x),rect=[0,-2,2*%pi,2]);/// \sleftarrow{\normalfont just check it }