Default Gallery Link

My site works on wordpress TewntyEleven Theme. On my homepage i am using default gallery to show pictures that link to other pages. the problem is that only the pictures are link by default but not the text under that describe the picture.

i would like to link the text of the picture to the same link of the picture by default.

i dont know where the code is and how to change it. i am little begginer at this type of work and i will be glad for simlple solution.