|¯¯¯¯¯|
|aaaa |
|bbb  |
|     |
|_____|

|¯¯¯¯¯|
|[img]|
|sub  |
|cccc |
|_____|

* "a", "b" and "c" is just random text
* "[img]" is a large image (no wrapping, i.e. text only above and below)
* "sub" is the image caption (within the image frame)

How to make "cccc" automatically move up to fill the blank space on the first page?