How to Open Quick Look
Viewing a folder full of images takes only seconds with the Quick Look feature. If you don’t want a full-screen view, tap the double-arrow icon at the bottom of the Quick View image to go to Window view.
Using Quick Look
When you first use Quick Look, the images open full-screen by default, with a control bar at the bottom of each one and on a black background. They operate in slideshow mode, slowing moving from one image to the next unless you select the Play/Pause control at the bottom of the screen to stop on a photo. You can use the Right Arrow on the control bar or the keyboard to move forward in the group of images or the Left Arrow to move backward, in either Play or Pause mode.
Index Sheet in Quick Look
Not interested in slowly scanning the images via a slideshow? Select the Index Sheet icon (four boxes) at the bottom of any photo in Quick Look to see a full screen of the chosen images on a black background. Tap any photo in Index View to go to it in Quick Look.
Sharing From Quick Look
When you find the photo you are looking for, click the Sharing icon at the bottom of the image. You can email the photo, AirDrop it to a nearby device, or add it to the Photos app, a Note, Reminder, or Message. To exit Quick View, press ESC on the keyboard or click Close on the image control bar.
Beyond Photos
Quick Look doesn’t only work with images. It can be used with a folder containing documents and other media such as video. Remember to open the folder and select the files inside before pressing Option+Spacebar.