Undo last action

`Command` + `Z`

All hotkeys for Apple Photos (MacOS)

Organize Move to the top of the photo library	`Home`
Organize Move to the bottom of the photo library	`End`
Organize Create new album	`Command` + `N`
Organize Create new album from selection	`Shift` + `Command` + `N`
Organize Create new Smart Album	`Option` + `Command` + `N`
Organize Show or hide titles	`Shift` + `Command` + `T`
Organize Show or hide keywords	`Shift` + `Command` + `K`
Organize Show or hide film rolls	`Shift` + `Command` + `F`
Organize Show or hide all film roll photos	Hold down the `Option` key and click the triangle next to any film roll
Organize Show or hide ratings	`Shift` + `Command` + `R`
Organize Set the title, date, or comments of multiple photos	`Shift` + `Command` + `B`
Organize Assign, edit, or search by keywords	`Command` + `K`
Organize Show a photo’s image and camera information	`Command` + `I`
Organize Duplicate a photo	`Command` + `D`
Organize Cut photo	`Command` + `X`
Organize Copy photo	`Command` + `C`
Organize Paste photo	`Command` + `V`
Organize Move photo to Trash from the photo library, or remove photo from album	`Delete`
Organize Move photo to Trash from album	`Command` + `Option` + `Delete`
Organize Open photo in its own window or in edit view (depends on the double+click preference you set)	`Double` + `click the photo`
Organize Reverse double+click preference when opening a photo	`Option` + `double` + `click the photo`
Rating photos Assign zero stars to a photo	`Command` + `0`
Rating photos Assign zero stars to a photo	`Command` + `1`
Rating photos Assign zero stars to a photo	`Command` + `2`
Rating photos Assign zero stars to a photo	`Command` + `3`
Rating photos Assign zero stars to a photo	`Command` + `4`
Rating photos Assign zero stars to a photo	`Command` + `5`
Import Import photos	`Shift` + `Command` + `I`
Edit Rotate photo clockwise	`Command` + `R`
Edit Rotate photo counter clockwise	`Option` + `Command` + `R`
Edit Go to next photo	`Right Arrow key`
Edit Go to previous photo	`Left Arrow key`
Edit Disable constrain setting when selecting an area	Press the `Command` key while dragging
Edit Switch between portrait and landscape constrain setting when selecting an area	Press the `Option` key while dragging
Edit Return to organize view	`Double` + `click the photo`
Edit Undo last action	`Command` + `Z`
Edit Redo last action	`Shift` + `Command` + `Z`
Selecting and deselecting photos Select a single photo	`Click the photo`
Selecting and deselecting photos Select all photos	`Command` + `A`
Selecting and deselecting photos Select all photos between the current selection and a non+adjacent photo	Hold down the `Shift` key and click the non+ `adjacent photo`
Selecting and deselecting photos Select photos that are non+adjacent to each other	Select the first photo, then hold down the `Command` key and click additional photos
Selecting and deselecting photos Select several photos located together	`Click outside the photos and drag to enclose them within the selection rectangle`
Selecting and deselecting photos Select all photos in a film roll	`Click the film roll icon`
Selecting and deselecting photos Deselect specific photos in a group of selected photos	Hold down the `Command` key and click the photos you want to deselect
Selecting and deselecting photos Deselect all photos	`Shift` + `Command` + `A` or click outside a photo
Slideshow Stop a slideshow	`Press the mouse button`
Slideshow Pause and resume playing	`Press the Space bar`
Slideshow Adjust the speed	`Use the Up and Down Arrow keys`
Slideshow Move through a slideshow manually	`Use the Right and Left Arrow keys`
Slideshow Rate photos	`Press 0, 1, 2, 3, 4, or 5`
Share Print	`Command` + `P`
Share Page setup	`Shift` + `Command` + `P`
Book Apply a page design through the end of a book	Select the first page you want changed and press the `Option` key when choosing a design from the Page Design pop+ `up menu`
Book Show fonts	`Command` + `T`
Book Copy font	`Command` + `3`
Book Paste font	`Command` + `4`
Book Spelling	`Command` + `:` (colon)
Book preview Move forward/Back one page	`Right Arrow key` / `Left Arrow key`
General Show preferences	`Command` + `,` (comma)
General iPhoto Help	`Command` + `?`
General Close window	`Command` + `W`
General Minimize window	`Command` + `M`
General Hide iPhoto	`Command` + `H`
General Quit iPhoto	`Command` + `Q`