1. A computing system for displaying a GUI element on a natural user interface on a display, the computing system comprising: a display configured to display a natural user interface of a program executed on the computing system; a gesture sensor configured to detect a gesture input directed at the natural user interface by a user; and a processor configured to execute: a gesture-recognizing module configured to recognize a registration phase, an operation phase, and a termination phase of the gesture input; a gesture assist module configured to display a GUI element overlaid upon the natural user interface, the GUI element being first displayed in response to recognition of the registration phase by the gesture-recognizing module, and including a visual or audio operation cue to prompt the user to carry out the operation phase of the gesture input, and a selector manipulatable by the user via the operation phase of the gesture; where upon receiving user input via the selector the gesture-recognizing module is configured to send the operation phase to the program, and the program is configured to determine a parameter adjustment based upon the user input received in the operation phase; where the processor is further configured to execute a natural user interface control module configured to perform a natural user interface update responsive to recognition of the operation phase and based on the parameter adjustment determined by the program; where the gesture assist module is further configured to receive the parameter adjustment from the program and perform a GUI element update based on the parameter adjustment; and where the natural user interface update and GUI element update are sent to the display.