Hi Meva,
I am not sure if I understand your question completely. Are you wanting to add a "textarrow" annotation object to your plot that has more than one line of text?
If so, you could achieve the same using the code snippet below (in R2014b and R2015a)
F=figure();
plot(1:10);
h = annotation('textarrow');
set(h,'Parent',gca)
set(h,'String',{'\epsilon','\theta'})
set(h,'FontSize',18)
set(h,'X',[5 7]);
set(h,'Y',[5 5]);
Hope this helps !
Thanks
Vinod
