1. A computer-implemented method for navigating an electronic document on a terminal, comprising: displaying, by a processor of the terminal, a page of a section of the electronic document on a touch screen of the terminal, the electronic document including one or more sections, each section including one or more pages; defining, on the touch screen, multiple regions that include a first region, a second region, and a third region; in response to detecting a tap gesture on the first region, displaying a slider on a slide bar on the touch screen, the slide bar including an expanded part corresponding to the displayed section of the electronic document, the expanded part being disproportionately larger than other parts of the slide bar corresponding to other sections of the electronic document, the slide bar displayed without displaying an indication of the expanded part and the other parts of the slide bar; detecting a drag gesture on the touch screen, the drag gesture including a movement of the slider on the slide bar; detecting a release gesture of the slider on the touch screen; displaying, on the touch screen, a target page of the electronic document based on the release gesture; in response to detecting the tap gesture on the second region, displaying a next page of the electronic document; and in response to detecting the tap gesture on the third region, displaying a previous page of the electronic document.