1. A method of manipulating display of document pages on a touchscreen computing device, the method comprising: recognizing, by the touchscreen computing device, finger motion selection gestures on a touchscreen of the touchscreen computing device; selecting, by the touchscreen computing device for each recognized finger motion selection gesture, a document page displayed on the touchscreen; recognizing, by the touchscreen computing device, a finger motion combination gesture on the touchscreen, wherein recognizing the finger motion combination gesture includes detecting simultaneous lifting of a plurality of fingers from the touchscreen; combining, by the touchscreen computing device responsive to the finger motion combination gesture, the selected document pages into a single concatenated document page; and displaying, by the touchscreen computing device, the single concatenated document page; recognizing, by the touchscreen computing device, a finger motion lock gesture on the touchscreen; locking, by the touchscreen computing device responsive to the finger motion lock gesture, position of the selected document pages within the single concatenated document page; recognizing, by the touchscreen computing device, a finger motion movement gesture on the touchscreen; and in response to recognition of the finger motion movement gesture when the position of the selected document pages are locked, moving, by the touchscreen computing device, the single concatenated document page.