1. A method, comprising: at an electronic device with a touch-sensitive surface and a display, wherein the device includes one or more sensors to detect intensities of contacts with the touch-sensitive surface: displaying a user interface that includes a plurality of representations of content, including a respective representation of content corresponding to respective content associated with a respective application, wherein the respective representation of content is different from the respective content associated with the respective application; while a focus selector is over the respective representation of content, detecting a gesture that includes a contact on the touch-sensitive surface; and in response to detecting the gesture: in accordance with a determination that the gesture meets criteria for displaying a new application window, wherein the criteria for displaying the new application window do not require that the contact had a maximum intensity during the gesture that met a respective intensity threshold in order for the criteria for displaying a new application window to be met, displaying the respective content in a new application window of the respective application; and in accordance with a determination that the gesture meets criteria for displaying a preview, wherein the criteria for displaying the preview require that the contact reached an intensity during the gesture that was above the respective intensity threshold, displaying a respective preview of the respective content without displaying a new application window of the respective application, wherein the respective preview of the respective content was not displayed prior to detecting the gesture and displaying the preview of the respective content includes: during a first portion of the gesture, in response to detecting the intensity of the contact increase from an intensity below the respective intensity threshold to an intensity above the respective intensity threshold, decreasing a size of a portion of the user interface relative to a remaining portion of the user interface, wherein: the portion of the user interface further decreases in size as the intensity of the contact increases above the respective intensity threshold; and the change in size of the portion of the user interface indicates that the respective preview of the respective content will be displayed without displaying the new application window of the respective application; during a second portion of the gesture that is detected after the contact has reached an intensity that is above the respective intensity threshold, displaying the preview of the respective content; and during a third portion of the gesture that is detected while the contact continues to be detected on the touch-sensitive surface at an intensity that is below the respective intensity threshold, maintaining display of the preview of the respective content on the display.