Keyboard Shortcuts
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: Flip image vertically
Ctrl-Shift-B: Add black and white effect
Ctrl-8: Add a star / remove a star
Shift+Graduated Tint: Radial Tint
Shift+Heat Map: Night Vision
Shift+Vignette: Matte
Shift+Pixelate: Focal Pixelate
Shift+Border: Rounded Edges
Shortcuts for watching videos
/ [slash]: Pause or play video
, [comma]: Rewind video
. [period]: Fast forward video
Miscellaneous shortcuts
Ctrl-E: Email selected photos(no longer works as of 2016)Ctrl-P: Print selected images
Ctrl-Shift-P: Print album contact sheet
Ctrl-T: Add tags to your photos
Ctrl-N: Create a new album
F1: View help content
X: Exclude a photo when importing
Ctrl-M Open the import window
Unknown shortcut causes the "Make a Caption!" field to flush right and appears next to the trash can icon for deleting captions. If this happens, close Picasa and restart it. The caption should return to the center position.
Shortcuts in the Picasa Photo Viewer
E: Edit in Picasa
Ctrl-R: Rotate the image clockwise
Ctrl-Shift-R: Rotate the image counter-clockwise
Space: Toggle background
Left and right arrow keys: Next/Previous image
J/K: Next/Previous image
Page Up/Page Down: Zoom in/Zoom out
1: Toggle 100% zoom
+/- (not the numeric keypad): Zoom in/Zoom out
Mousewheel: Zoom in/Zoom out
Adjust mouse wheel behavior by clicking the down arrow menu > Configuration > User Interface tab. Select "Zoom with mousewheel (hold Ctrl to navigate)" then click Ok.
8: Toggle star
Ctrl-8: Add a star / remove a star
C: Photo Viewer Configuration
Esc: Close Picasa Photo Viewer
U:Upload current photo(no longer works as of 2016)Ctrl-U: Single image upload (no longer works as of 2016)B: Blog (no longer works as of 2016)M: Email (no longer works as of 2016)
MAC
Shortcuts for selecting photos
Command-A: Select all photos in a folder/album
Command-D: Deselect photos
Control-I: Invert photo selection
fn-left arrow: Select the first photo in your folder/album
fn-right arrow: Select the last photo in your folder/album
Control-O: Choose a file on your computer to display in Picasa.
Shortcuts for viewing photos
Command-1: View your photos as small thumbnails
Command-2: View your photos as large thumbnails
Command-4: Start a slideshow
Command-I: View image properties
Control-Enter: Locate the photo file in Finder
Shortcuts for editing photos
Command-3: Open an image in 'Edit Mode'
Control-R: Rotate the image clockwise
Control-Shift-R: Rotate the image counter-clockwise
Control-Shift-H: Flip image horizontally
Control-Shift-V: Flip image vertically
Control-Shift-B: Add black and white effect
Space bar: Add or remove star
fn-F3: Rename file
Shortcuts for watching videos
/ [slash]: Pause or play video
, [comma]: Rewind video
. [period]: Fast forward video
Miscellaneous shortcuts
Command-E: Email selected photos(no longer works as of 2016)Command-P: Print selected images
Command-Shift-P: Print album contact sheet
Command-T: Add tags to your photos
Command-N: Create a new album
fn-F1: View help content
Command-M: Open the import room
X: Exclude a photo when importing
