Abstract: An electronic device displays text of an electronic document on a display; displays an insertion marker at a first position in the text of the electronic document; detects a first horizontal gesture on a touch-sensitive surface; in response to a determination that the first horizontal gesture satisfies a first set of one or more predefined conditions: translates the electronic document on the display in accordance with a direction of the first horizontal gesture, and maintains the insertion marker at the first position in the text; and, in response to a determination that the first horizontal gesture satisfies a second set of one or more predefined conditions, moves the insertion marker by one character in the text from the first position to a second position in the text in accordance with the direction of the first horizontal gesture.

Abstract: An electronic device displays at least a portion of an electronic document with a predefined page layout at a first magnification level on a display; detects a first input indicating a first insertion point in the document, where the first insertion point is proximate to a first portion of text in the document; and in response to detecting the first input: selects a second magnification level different from the first magnification level, where the second magnification level is selected so as to display the first portion of text at a target text display size, and, while maintaining the predefined page layout of the document, displays, at the second magnification level, a portion of the document that includes the first portion of text.

Abstract: An electronic device displays at least a portion of an electronic document with a predefined page layout at a first magnification level on a display; detects a first input indicating a first insertion point in the document, where the first insertion point is proximate to a first portion of text in the document; and in response to detecting the first input: selects a second magnification level different from the first magnification level, where the second magnification level is selected so as to display the first portion of text at a target text display size, and, while maintaining the predefined page layout of the document, displays, at the second magnification level, a portion of the document that includes the first portion of text.