caption under medium size image

if you press a thumbnail of an image in a post you are moved to a page where it is a medium sized version of the picture with its title under it. It would make more sense to get the caption text under it or, if you want to make it more interesting add options under settings-media next to medium size image and tick boxes under a text
which text would you like to be diplayed under medium sized version of an image

title
alternate
caption
description