A method, comprising: at an electronic device with a touch-sensitive surface and a display: displaying a user interface with a plurality of content units, wherein: the plurality of content units are arranged along a first scrolling axis in the user interface; and a respective content unit is associated with corresponding metadata; detecting a single contact on the touch-sensitive surface and detecting a first movement of the single contact; and, in response to detecting the first movement of the single contact: moving a first set of two or more of the content units perpendicular to the first scrolling axis in the user interface in accordance with the first movement of the single contact, wherein the first set of content units includes a first content unit and a second content unit; and for two or more respective content units in the first set of content units, displaying 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 single contact, including concurrently displaying, on the display: first metadata for the first content unit adjacent to the first content unit; and second metadata, different from the first metadata, adjacent to the second content unit. at an electronic device with a touch-sensitive surface and a display: displaying a user interface with a plurality of content units, wherein: the plurality of content units are arranged along a first scrolling axis in the user interface; and a respective content unit is associated with corresponding metadata; detecting a single contact on the touch-sensitive surface and detecting a first movement of the single contact; and, in response to detecting the first movement of the single contact: moving a first set of two or more of the content units perpendicular to the first scrolling axis in the user interface in accordance with the first movement of the single contact, wherein the first set of content units includes a first content unit and a second content unit; and for two or more respective content units in the first set of content units, displaying 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 single contact, including concurrently displaying, on the display: first metadata for the first content unit adjacent to the first content unit; and second metadata, different from the first metadata, adjacent to the second content unit. displaying a user interface with a plurality of content units, wherein: the plurality of content units are arranged along a first scrolling axis in the user interface; and a respective content unit is associated with corresponding metadata; the plurality of content units are arranged along a first scrolling axis in the user interface; and a respective content unit is associated with corresponding metadata; detecting a single contact on the touch-sensitive surface and detecting a first movement of the single contact; and, in response to detecting the first movement of the single contact: moving a first set of two or more of the content units perpendicular to the first scrolling axis in the user interface in accordance with the first movement of the single contact, wherein the first set of content units includes a first content unit and a second content unit; and for two or more respective content units in the first set of content units, displaying 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 single contact, including concurrently displaying, on the display: first metadata for the first content unit adjacent to the first content unit; and second metadata, different from the first metadata, adjacent to the second content unit. moving a first set of two or more of the content units perpendicular to the first scrolling axis in the user interface in accordance with the first movement of the single contact, wherein the first set of content units includes a first content unit and a second content unit; and for two or more respective content units in the first set of content units, displaying 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 single contact, including concurrently displaying, on the display: first metadata for the first content unit adjacent to the first content unit; and second metadata, different from the first metadata, adjacent to the second content unit. first metadata for the first content unit adjacent to the first content unit; and second metadata, different from the first metadata, adjacent to the second content unit.