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; 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.