Click and drag on the schematic sheet to draw the shape of your component. : Select Component Pin Mode (the icon with a dot and a line).

Enter a (e.g., VCC, GND) and a Pin Number that matches the physical footprint. Create the Device :

In Proteus ISIS 7.7, "generating a piece" typically refers to that isn't already in the standard library. Step-by-Step: Generating a New Component Follow these steps to create a custom schematic part: Draw the Component Body :