Disclosed herein are single-finger gestures for activating a trackpad mode on a touch-sensitive device with no force sensors. An example method includes: displaying a virtual keyboard on a touch-sensitive display with a spacebar key and other keys. Detecting a first extended contact over the virtual keyboard and, in accordance with a determination that the first extended contact is over any of the respective displayed representations of the other keys, interpreting the first extended contact as a keyboard input and activating a corresponding extended keyboard function. The method also includes: detecting a second extended contact over the virtual keyboard. The method further includes: in accordance with a determination that the second extended contact is over a respective displayed representation of the spacebar key, interpreting the second extended contact as a mode-switching input that causes the electronic device to operate at least a portion of the touch-sensitive display as a trackpad.