Numbering Slots Individually
You can specify slot numbers individually and assign any alphanumeric value.
To number slots individually:
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                     Open an Equipment specification in the Equipment Specification editor. 
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                     Click the Visualization tab. 
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                     In the canvas area, click an occupied slot. The selected slot is highlighted in the canvas, and information about it appears in the information area. 
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                     In the information area, enter a value for the selected slot in the slotNumber field. 
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                     From the File menu, select Save.