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Menu navigation in this courseware is enabled by using the tab key. Arrow keys are also enabled to assist you. Make a menu selection using the space bar or enter key. For PC: Playback of the animations and audio is controlled by pressing the control and backspace keys simultaneously and the captioning area can be toggled open or closed using the insert key. For Mac: Playback of the animations and audio is controlled by pressing the Apple/Option and delete keys simultaneously. The captioning area can be toggled open or closed using the help key.