Click [Address] in the Work Space.

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If the [Address] tab is not displayed in the Work Space, from the [View (V)] menu, point to [Work Space (W)] and select [Address (A)].
Select [Symbol Variable].
From the [Type] drop-down list, select the symbol's address type.
In the [Attribute] drop-down list, select the device/PLC for the symbol variable to display. The symbol variable's address list is displayed.

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To associate an address with a part, you can drag the address to a part displayed on the screen.
When you double-click the address selected from the list, you can open the [Symbol Variable Settings] dialog box.
Click the icon
to display the [Unused Symbol Variables] dialog box, then select Unused Symbol Variables. You can delete all the Symbol Variables that display in the list.