Abstract: An electronic device, while displaying a user interface with a favored navigation axis, detects first movement of a contact on a touch-sensitive surface that includes a first component along the favored navigation axis and a second component in a direction different from the favored navigation axis. In response, if first movement meets direction-lock termination criteria, the device moves one or more user interface objects in two dimensions in accordance with both components of the first movement; and if first movement does not meet the direction-lock termination criteria, the device moves user interface objects in one dimension along the favored navigation axis in accordance with the first component of the first movement. After meeting the direction-lock termination criteria, in response to continued second movement of the contact, the device moves user interface objects in accordance with the second movement without regard to whether the second movement meets the direction-lock termination criteria.

Abstract: An electronic device, while displaying a user interface with a favored navigation axis, detects first movement of a contact on a touch-sensitive surface that includes a first component along the favored navigation axis and a second component in a direction different from the favored navigation axis. In response, if first movement meets direction-lock termination criteria, the device moves one or more user interface objects in two dimensions in accordance with both components of the first movement; and if first movement does not meet the direction-lock termination criteria, the device moves user interface objects in one dimension along the favored navigation axis in accordance with the first component of the first movement. After meeting the direction-lock termination criteria, in response to continued second movement of the contact, the device moves user interface objects in accordance with the second movement without regard to whether the second movement meets the direction-lock termination criteria.

Abstract: An electronic device with a display and a touch-sensitive surface displays a user interface with a plurality of content units, where the content units are arranged along a first axis in the user interface, and a respective content unit is associated with corresponding metadata. The device detects a contact on the touch-sensitive surface and a first movement of the contact. In response to detecting the first movement of the contact, the device moves a first set of one or more of the content units perpendicular to the first axis in the user interface in accordance with the first movement, and for one or more respective content units in the first set of content units, the device displays metadata for the respective content unit adjacent to the respective content unit that was not displayed immediately prior to detecting the first movement of the contact.

Abstract: An electronic device with a display and a touch-sensitive surface displays a user interface with a first electronic message, where the first electronic message is associated with corresponding message time metadata. While displaying the first electronic message, the electronic device detects only a single contact on the touch-sensitive surface and detect a first movement of only the single contact. In response to detecting the first movement of only the single contact, display message time metadata for the first electronic message adjacent to the first electronic messages, wherein the message time metadata was not displayed immediately prior to detecting the first movement of the single contact.

Abstract: An electronic device with a display and a touch-sensitive surface displays a user interface with a first electronic message, where the first electronic message is associated with corresponding message time metadata. While displaying the first electronic message, the electronic device detects only a single contact on the touch-sensitive surface and detect a first movement of only the single contact. In response to detecting the first movement of only the single contact, display message time metadata for the first electronic message adjacent to the first electronic messages, wherein the message time metadata was not displayed immediately prior to detecting the first movement of the single contact.

Abstract: An electronic device with a display and a touch-sensitive surface displays a user interface with a plurality of content units, where the content units are arranged along a first axis in the user interface, and a respective content unit is associated with corresponding metadata. The device detects a contact on the touch-sensitive surface and a first movement of the contact. In response to detecting the first movement of the contact, the device moves a first set of one or more of the content units perpendicular to the first axis in the user interface in accordance with the first movement, and for one or more respective content units in the first set of content units, the device displays metadata for the respective content unit adjacent to the respective content unit that was not displayed immediately prior to detecting the first movement of the contact.