1. Select File --> New --> Cell view in library manager and choose library under which you would like to create the new cell view
2. Enter a cell view name and choose Composer-Symbol as the tool. View name should be symbol exactly according to Figure 11.
Figure 11. Creating a symbol
Then, the symbol editing window should be appeared. It allows you to draw any kind of shape to represent you logic gate.
The important thing is to have input and output pins match whatever it is you are representing. In this case, we need to match input pin "IN" and output pin "OUT"
of the inverter. Rather than drawing an symbol of inverter, it is much easier to copy one that has already been drawn.
To import a symbol,
1. From Symbol Editing menu, select Add --> Import Symbol. This brings out Import Symbol form. Click on Browse and select inverter in library of
NCSU_Digital_Parts. The form should be same like Figure 12.
Figure 12. Importing symbol
2. Put the symbol down in the Symbol Editing like in Figure 13.
Figure 13. The inverter symbol
3. Don't forget to save by selecting Design --> Check and Save in Symbol Editing menu.
