retaining minor grid lines when fontsize is increased

In a 2-D plot, when I use FontSize of 18 rather than 12, my minor grid lines no longer show. Is there a way to retain them? i.e. with this sequence of commands, they are there: grid('on') set(gca,'XMinorGrid','on') set(gca,'YMinorGrid','on') set(gca,'FontSize',12)

with this sequence, they are not: grid('on') set(gca,'XMinorGrid','on') set(gca,'YMinorGrid','on') set(gca,'FontSize',18)

[Salaheddin Hosseinzadeh]

Do you want to change the plot size? I mean the curve you're plotting or you really want to change the setting of the axis that's why you're using gca