Abstract: A method includes: displaying simultaneously a plurality of columns in a multi-column application that comprises: a first column that includes user-modifiable content items; and a second column that includes user-selectable items; detecting a first input that corresponds to a request to enter an edit mode for the first column; in response to detecting the first input: entering the edit mode for the first column; and deactivating the user-selectable items in the second column; while in the edit mode for the first column: detecting one or more edit inputs; and in response to detecting the edit inputs, editing one or more of the user-modifiable content items in the first column; detecting a second input that corresponds to a request to exit the edit mode for the first column; and in response to detecting the second input: exiting the edit mode, and reactivating the user-selectable items in the second column.

Abstract: An electronic device displays one or more thumbnails. The device detects a first multi-contact gesture that includes movement of a first contact and a second contact; and, in response to detecting the first multi-contact gesture, the device displays content associated with a respective thumbnail and enlarges the content associated with the respective thumbnail to a respective enlarged size in accordance with the first multi-contact gesture. The device detects termination of the first multi-contact gesture; and, in response to detecting termination of the first multi-contact gesture: when a resizing metric based on the first multi-contact gesture is below a predefined threshold, the device ceases to display the content at the respective enlarged size; and, when the resizing metric based on the first multi-contact gesture is above the predefined threshold, the device displays the content on the display in a predefined arrangement.