A computer system displays: a view window including an initial portion of a document, a scroll icon at an initial scroll icon location on the display, and a marker icon that is distinct from the scroll icon. The computer system detects a scrolling input and in response moves the scroll icon to a target scroll icon location on the display wherein the target scroll icon location corresponds to a target portion of the document. In some embodiments, the computer system scrolls the document towards the target portion of the document and concurrently moves the marker icon towards a target marker icon location on the display that is proximate to the target scroll icon location, where the scrolling speed of the document is determined based on the distance between the marker icon and the scroll icon.