Nikon Digital Cameras Reference Manual page 26

Refreshing Thumbnails and Folders
Nikon View does not immediately recognize changes made to
the memory card from the camera. If you add, copy or delete
image files from a folder, or add or delete folders from the
memory card using the camera controls, you must refresh the
thumbnails and folders for Nikon View to recognize those
changes.
To update the thumbnails, select Refresh from the View menu
or click the Refresh button in the toolbar.
Click the right mouse button in an empty area of the window and choose
Refresh from the right-button menu.
Caution!
Do not disconnect the camera until the borders of the data-transfer dis-
play stop flashing. (The data transfer display varies according to your cam-
era model.)
The image files in the selected source (the camera if Digital
Camera is selected, a compact flash-memory card reader if
Removable Media is selected, or a specified folder on a disk
if Hard Disk is selected) will be read, and thumbnail previews
displayed in the window.
You can select Refresh from the View menu, while the fold-
ers are displayed.
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