the delete menu contains the follwing options:

deleting selected photographs and movies
choosing selected images from the delete menu displays the pictures on the memory card as thumbnail images. to select pictures for deletion:

deleting all photographs and movies
selecting erase all images from the delete menu displays the confirmation dialog shown at right.

selecting pictures for deletion
no more than fifty pictures can be selected at one time using the delete ]selected images option. at the fifty-first picture, the message "image cannot be saved" will be briefly displayed and you will be returned to the thumbnail menu. any pictures after the fiftieth will not be selected for deletion when you press the quick button.
before deletion
once deleted, pictures can not be recovered. be sure that any pictures you would like to keep have been transferred to your computer. protected pictures
pictures marked with a

icon are protected and can not be selected for deletion.