Shortcuts for Selecting Photos:
[Crtl]+[A] - Select all photos in album
[Crtl]+[D] - De-select Photos
[Crtl]+[I] - Invert Photo selection
[Home] - Select the first photo in the album
[End] - Select the last photo in the album
[Ctrl]+[H] - Hold selected photos photo tray
[Ctrl]+[Enter] - Locate the photo file on your computer
[Ctrl]+[O] - Open a photo file on your computer
Shortcuts for Viewing Photos:
[Ctrl]+[1] - View your photos as small thumbnails
[Ctrl]+[2] - View your photos as large thumbnails
[F11] - Use Picasa in full-screen mode
[Ctrl]+[4] - Start a slideshow
[Ctrl]+[5] - View your timeline
Shortcuts for Editing Photos:
[Ctrl]+[3] - Open an image in Edit mode
[Ctrl]+[R] - Rotate the image clockwise
[Ctrl]+[Shift]+[R] - Rotate the image Counter clockwise
[Ctrl]+[Shift]+[H] - Flip image horizontally
[Ctrl]+[Shift]+[V] - Flip image vertically
[Ctrl]+[Shift]+[B] - Add Black & White effect
Others:
[Ctrl]+[E] - E-mail selected photos
[Ctrl]+[P] - Print selected images
[Ctrl]+[Shift]+[P] - Print album contact sheet
[Ctrl]+[F] - Search
[Ctrl]+[K] - Add keywords to your photos
[Ctrl]+[N] - Create new album
[F1] - View help content
[X] - Exclude a photo in import mode
Shortcuts for Watching Videos:
[/] - Pause/play Video
[,] - Rewing Video
[.] - Fast forward video
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