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## Megatek Buttons

    Button    Function

    1         View Mode:  Restores View
              Edit Mode:  Translation in the Object-Edit mode
    2         View Mode:  Saves View
              Edit Mode:  Translation in the Object-Edit mode
    3
              Edit Mode:  Saves the model being displayed on the screen
    4         Off:        Viewing mode
              On:         Edit mode
    5         View Mode:  Resets View
              Edit Mode:  Scaling in the Object-Edit mode
    6
              Edit Mode:  Rotation in the Object-Edit mode
    7         View Mode:  Angle/Distance Cursor
              Edit Mode:  Translation in the Object-Edit mode
    8
              Edit Mode:  Rejects display and returns to Viewing display
    9         View Mode:  Bottom View
              Edit Mode:  Scaling in the Solid-Edit mode
    10        View Mode:  Left View
              Edit Mode:  Rotation in the Solid-Edit mode
    11        View Mode:  Rear View
              Edit Mode:  Translation in the Solid-Edit mode
    12        View Mode:  90, 90 View
              Edit Mode:  Restores Edit mode menu
    13        View Mode:  Top View
              Edit Mode:  Transfers from Viewing to Solid Pick
    14        View Mode:  Right View
              Edit Mode:  Transfers from Viewing to Object Pick
    15        View Mode:  Front View

    16        View Mode:  35/45 View

    	Megatek Buttons

The Megatek button box is a general purpose input/output device that communicates with MGED through an intelligent control unit. The device has eight rotatable knobs and 16 buttons with lights. The ``buttons'' and ``knobs'' of the Megateks are located in the same box. There are not enough buttons to have just one assigned meaning, hence most buttons have dual functions. To toggle the functions of the buttons, use the upper right button (toggle button). When the light on this button is ON, the functions listed on the RIGHT above each button is the current function. When the light on the ``toggle'' button is OFF, the functions labeled on the LEFT are then in effect. The left/right meaning of these buttons is grouped generally according to viewing functions on the left and editing functions on the right.

The table above summarizes the uses of the buttons. Depressing the button switches the light on and off. Many of these serve a dual role depending upon the selected mode - viewing or editing. The mode is selected by depressing button 4. If light 4 is off, the system is performing in the viewing mode, and the commands shown in the top half of the table are executed. If light 4 is on, the system is performing in the edit mode, and the commands shown in the bottom half are executed.