I recently got approved for a 15 day France-issued Schengen visa. I would also like to visit Switzerland and stay longer in France. The trip is still months away. Is it possible to request an extension, can I apply to France for a new visa, or to Switzerland? The problem is that: I would like to stay from approximately May 21 to Jun 19 (clearly less than 90 days...) But France only issued me 15 days with validity from May 14 to Jun 14. This makes it impossible to apply for another Schengen visa valid before Jun 15. What should I do here? Apply for a Switzerland Schengen visa from May 21 to Jun 19 and stay in France for the beginning part and Switzerland as intended?