A method is performed by an electronic device with a display and a touch-sensitive surface. The method includes: displaying a progress icon that indicates a current position within a first piece of content; displaying a multi-purpose content navigation icon; while providing the first piece of content: detecting a first contact at a first location that corresponds to the multi-purpose content navigation icon; while continuing to detect the contact at the first location, moving the current position within the first piece of content at a predefined scrubbing rate; and, in response to detecting movement of the contact that includes a first component of movement in a direction that corresponds to movement on the display parallel to the first predefined direction, moving the current position within the first piece of content at a variable scrubbing rate that varies monotonically as the first component of movement increases.