Unlike graphical attributes, internal attributes cannot be displayed directly in the drawing. To display the value of an internal attribute in the drawing, you must add a graphic attribute to the symbol that includes a field code that references the internal attribute.
To display an internal attribute of a symbol
If you want to view the tolerance value of a resistance, do the following:
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Create the field code for the internal attribute named TOLERANCE:
Press the key combination CTRL+ALT+D to open the Document properties dialog box.
Select the Field codes tab.
Click the Add button. The dialog box opens.
In the dialog box specify TOLERANCE as the name of the field code to be created and as the value enter ${tolerance}.
Click on OK to close the dialog box.
Click on Ok to close the document properties window.
Create the graphic attribute:
Choose the Library » Attribute command or click on the tool in the toolbar. The Attribute properties dialog opens.
In the dialog box specify TOLERANCE as the attribute name and right-click in the Value field then choose the Insert » Field code command.
Select the field code TOLERANCE and click the button Insert.
Click on OK to close the dialog box. The graphic attribute is created and linked to the mouse cursor. Instead of the tolerance value, the # character is displayed.
Drag the mouse to position the graphic attribute and click to insert it into the drawing.
Enter the graphic attribute in the symbol:
Select the graphic attribute.
Press and hold SHIFT and select the destination symbol.
Choose the Schematic » Symbol » Insert or click the button in the toolbar.