Duplicate an album in Photos
In Photos, to duplicate an album, Control-click the album in the sidebar, then choose “Duplicate Album” from the pop-up menu.
Change the date and time associated with a photo in Photos
In Photos, to change the date and time associated with a photo, select the photo, then choose Image>Adjust Date and Time.
Go to Photos, Memories, Shared, Albums, or Projects in Photos
In Photos, press Command-1, Command-2, Command-3, Command-4, or Command-5 to quickly go to your Photos, Memories, Shared, Albums, or Projects.
Permanently delete a photo in Photos
In Photos, to delete a photo and then remove it from the Recently Deleted album, select the photo you want to delete, then press Command-Delete, then open the Recently Deleted album, select the photo you want to delete permanently, then click Delete and click OK.
Change a Live Photo to a still image in Photos
In Photos, to change a Live Photo to a still image, select the photo, then choose Image> Turn Off Live Photo.
Flip a photo horizontally in Photos
In Photos, to flip a photo horizontally, select the photo, then choose Image> Flip Horizontal.
Scroll down through your projects and albums in Photos
In Photos, swipe down with two fingers to scroll down through your projects and albums.
Include holiday photos as memories in Photos
In Photos, to include holiday photos as memories, choose Photos> Preferences> General, then select the "Show Holiday Events" checkbox.
Remove location information from a photo in Photos
In Photos, to remove location information from a selected photo, choose Image> Location> Remove Location.
Flip an image vertically in Photos
In Photos, when cropping a photo, Option-click the Flip button to flip the image vertically.
Show or hide thumbnails in Photos
When viewing an individual photo in Photos, click the Thumbnails button in toolbar to show or hide thumbnails under the photo.
Sort photos in an album alphabetically in Photos
In Photos, to sort photos in a selected album alphabetically, choose View> Sort, then choose Keep Sorted By Title.
Mark up a photo in Photos
In Photos, to mark up a photo, double-click the photo, click Edit, then click the Extensions button and choose Markup.
Play a slideshow from selected photos in Photos
In Photos, to play a slideshow from selected Photos, Control-click one of the photos, then choose Play Slideshow from the pop-up menu.
Trim a video in Photos
In Photos, to trim a video, display the player controls, then click the Action (gear) pop-up menu and choose Trim.
Rotate a photo counter-clockwise in Photos
In Photos, press Option-Command-R to rotate a selected photo clockwise.
Zoom in and out in Photos
In Photos, while viewing an individual photo, double-tap the photo with two fingers to zoom between 100% and the Fit zoom level.
Include location information for published items in Photos
In Photos, to use location information embedded in photos taken by a GPS-enabled camera (including iPhone), choose Photos> Preferences> General, then select the “Include location information for published items” checkbox.
Get information about a photo in Photos
In Photos, tap a thumbnail with two fingers to open a contextual menu to get information about the photo, rotate it, share it, delete it, and more.
Reset an adjustment slider in Photos
In Photos, when editing a photo using the adjustment sliders, double-click within a slider to reset its value back to zero.
Show or hide the sidebar in Photos
In Photos, to show or hide the sidebar, choose View> Show Sidebar, or View> Hide Sidebar, or press Command-Option-S.
Straighten a photo automatically in Photos
In Photos, when straightening a photo, click the Auto button to straighten the photo automatically.
See what Moment a photo belongs to in Photos
When viewing a photo in an album in Photos, to see what Moment it belongs to, Control-click the photo, then do Show in Moment.
Flip an image horizontally in Photos
In Photos, when cropping a photo, click the Flip button to flip the image horizontally.
Sort photos in an album by date in Photos
In Photos, to sort photos in a selected album by date, choose View> Sort> Keep Sorted By Oldest First, or View> Sort> Keep Sorted By Newest First.
Switch between photo libraries in Photos
To switch between photo libraries in Photos, hold down Option while opening Photos, then select a library or create a new one.
Quickly see the retouch tool while editing a photo in Photos
In Photos, to quickly see the retouch tool while editing a photo, press R.
Add keywords to a photo in Photos
In Photos, to add keywords to a photo, choose Window> Info, then click the Add a Keyword field, then type a keyword and press Return.
Choose to use a RAW file as the original in Photos
In Photos, when editing a photo in both RAW and JPEG formats, to use the RAW file as the original, choose Image> Use RAW as Original.
Crop a photo automatically in Photos
In Photos, when cropping a photo, click the Auto button to crop the photo automatically.
Pause or resume a slideshow in Photos
In Photos, press the Space bar when playing a slideshow to pause or resume playback.
Zoom out of a moment or collection in Photos
In Photos, when viewing a moment or collection, pinch closed to zoom out to see more photos at a time.
Export a photo as a desktop picture in Photos
In Photos, to export a selected photo as a desktop picture, click the Share button in the toolbar, then choose Set Desktop Picture.
Scroll up through your projects and albums in Photos
In Photos, swipe up with two fingers to scroll up through your projects and albums.
Rename an album in Photos
In Photos, to rename an album, click its name in the Albums list to select it, then click it again and type a new name.
Quickly import a folder of pictures into Photos
To quickly import a folder of pictures into Photos, drop the folder onto the Photos icon in your Dock, then click the Import All New Items button in Photos.
Crop to specific dimensions when cropping a photo in Photos
In Photos, to crop to specific dimensions when cropping a photo, click Aspect, then choose the aspect ratio you want to use.
Duplicate a photo in Photos
To duplicate a photo in Photos, select the photo you want to copy, then choose Image> Duplicate 1 Photo, or press Command-D.
Quickly export a photo from Photos
In Photos, to quickly export a photo, drag the photo to your desktop.
Select photos that are not adjacent to one another in Photos
In Photos, to select photos that are not adjacent to one another, select the first photo, then hold Command and click additional photos.
Add location information to a photo in Photos
In Photos, to add location information to a photo, double-click the photo to view it, then click the Info button in the toolbar and enter a location in the Location field.
Zoom in or out in Photos
When viewing an individual photo in Photos, pinch open or closed to zoom in or zoom out.
Flip a photo vertically in Photos
In Photos, to flip a photo vertically, select the photo, then choose Image> Flip Vertical.
View photos by location in Photos
In Photos, to view photos by location, click Photos in the toolbar, then click the location name in the heading of a collection or moment.
Quickly open a photo in Edit view in Photos
In Photos, to quickly open a selected photo in Edit view, press Return.
Play a slideshow from an album in Photos
In Photos, to play a slideshow from an album, Control-click the album name in the sidebar, then choose "Play Slideshow" from the pop-up menu.
Rotate a photo clockwise in Photos
In Photos, press Option-Command-R to rotate a selected photo clockwise.
Show split view in Photos
In Photos, to see other photos in a moment while you view a single photo, click the Split View button in the toolbar, or choose View> Show Split View.
View the location of your Photos library
In Photos, to view the location of your Photos library in the Finder, choose Photos> Preferences, then click General, then click Show in Finder.
Zoom in Photos
In Photos, press Z when viewing a photo to quickly zoom between the current zoom level and 100 percent.
Restore recently deleted items in Photos
In Photos, to restore recently deleted items, choose File> Show Recently Deleted, then select the photos you want to restore and click Recover.
Compare photos before and after editing in Photos
When editing a photo in Photos, to compare the edited version with the original, hold down the M key to see the original photo.
Mark a photo as a favorite in Photos
In Photos, to mark a photo as a favorite, select the photo, then choose Image> Add to Favorites, or simply press Period (.).
Set an album's key photo in Photos
In Photos, to set an album's key photo, representing the album in the Photos window, open the album, then select a photo and choose Image> Make Key Photo, or press Shift-Command-K.