Abstract: An electronic device that includes a touch-sensitive surface stores a plurality of sequences of images. The device displays a first representative image for a first sequence of images in a movable first area on a display. The device detects a gesture on the touch-sensitive surface, the gesture including movement by a contact that corresponds to movement in a first direction on the display. In response to detecting the gesture on the touch-sensitive surface: the device moves the first area in the first direction on the display; moves a movable second area in the first direction on the display; and, in accordance with a determination that sequence-display criteria are met, displays, in chronological order in the second area, at least some images for a second sequence of images acquired by the camera before acquiring a second representative image for the second sequence of images.

Abstract: An electronic device displays, on a display, a user interface. While displaying the user interface, the device detects an input on the touch-sensitive surface; and, in response to detecting the input while displaying the first user interface, and while detecting the input, in accordance with a determination that the input satisfies first timing criteria and first intensity input criteria, performs a first operation. The first timing criteria require that the input remain on the touch-sensitive surface while a first time period elapses. The first intensity input criteria require that the input satisfy a first intensity threshold at an end of or subsequent to the first time period.

Abstract: An electronic device displays, on a display, a user interface. While displaying the user interface, the device detects an input on the touch-sensitive surface; and, in response to detecting the input while displaying the first user interface, and while detecting the input, in accordance with a determination that the input satisfies an activation intensity threshold, performs a first operation. The activation intensity threshold includes a first intensity threshold component that decreases from a first intensity value over time.

Abstract: An electronic device with a touch-sensitive surface, a display, and one or more sensors to detect intensity of contacts: displays a plurality of user interface objects in a first user interface; detects a contact while a focus selector is at a location of a first user interface object; and, while the focus selector is at the location of the first user interface object: detects an increase in a characteristic intensity of the contact to a first intensity threshold; in response, visually obscures the plurality of user interface objects, other than the first user interface object, while maintaining display of the first user interface object; detects that the characteristic intensity of the contact continues to increase above the first intensity threshold; and, in response, dynamically increases the amount of visual obscuring of the plurality of user interface objects, other than the first user interface object.

Abstract: An electronic device with a touch-sensitive surface, a display, and one or more sensors to detect intensity of contacts: displays user interface objects in a first user interface; detects an input by a contact while a focus selector is over a first user interface object; if the input meets selection criteria, displays a second user interface; if a first portion of the input meets preview criteria, displays a preview area overlaid on at least some of the user interface objects, wherein the preview area includes a reduced scale representation of the second user interface; if a second portion of the input meets user-interface-replacement criteria, replaces display of the first user interface and the overlaid preview area with display of the second user interface; and, if the second portion of the input meets preview-area-disappearance criteria, ceases to display the preview area and displays the first user interface after the input ends.