Following list contains keyboard shortcuts for Windows Photo Gallery:
CTRL+F Opens the Fix pane
CTRL+P Prints selected picture
ENTER View the selected picture at a larger size
CTRL+I Open or close the Details pane
CTRL+PERIOD (.) Rotate the picture clockwise
CTRL+COMMA (,) Rotate the picture counter-clockwise
F2 Rename the selected item
CTRL+E Search for an item
ALT+LEFT ARROW Go back
ALT+RIGHT ARROW Go forward
PLUS SIGN (+) Zoom in or resize the picture thumbnail
MINUS SIGN (-) Zoom out or resize the picture thumbnail
CTRL+B Best fit
LEFT ARROW Select the previous item
DOWN ARROW Select the next item or row
UP ARROW Previous item (Easel) or previous row (Thumbnail)
PAGE UP Previous screen
PAGE DOWN Next screen
HOME Select the first item
END Select the last item
DELETE Move the selected item to the Recycle Bin
SHIFT+DELETE Permanently delete the selected item
LEFT ARROW Collapse node
RIGHT ARROW Expand node

Keyboard shortcuts for working with videos

J Move back one frame
K Pause the playback
L Move forward one frame
I Set the start trim point
O Set the end trim point
M Split a clip
HOME Stop and rewind all the way back to the start trim point
ALT+RIGHT ARROW Advance to the next frame
ALT+LEFT ARROW Go back to the previous frame
CTRL+K Stop and rewind playback
CTRL+P Play from the current location
HOME Move the start trim point
END Move to the end trim point
PAGE UP Seek to nearest split point before the current location
PAGE DOWN Seek to nearest split point after the current location