Use the following keyboard shortcuts to save time when viewing and editing in Picasa. Windows Shortcuts for selecting photos Ctrl-A : Select all photos in a folder/album Ctrl-D : Deselect photos Ctrl-I : Invert photo selection Home : Select the first photo in your folder/album End : Select the last photo in your folder/album Ctrl-H : Hold selected photos in Photo Tray Ctrl-O : Choose a file on your computer to display in Picasa. 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 Ctrl-Enter : Locate the photo file in Windows Explorer Hover over a photo and use Ctrl-Alt : Full-screen photo preview 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 :