D600 copy from Slot 2 to 1
the D800 has a copy images option in the playback menu, which i've never even seen before your question piqued my curiosity. i don't know if the D600 also supports this function, or whether it will work as you desire. still, at a quick glance it looked promising. until now, i probably would've answered no to your question...
|AT-6 Harvard by jarud|
from Trainer aircraft
|Monarch butterflies winter roost at Pismo Beach by cjf2|
from Safety in Numbers (Nature)