1. Open Word Document: Start Microsoft Word software and open the document to be edited.
2. Select the text insertion point: select or place the cursor in the document to the location where you want to add the postal code attribute.
3. Open the Insert tab: located in the tab at the top of the Word interface, find and click the Insert tab.
4. Find postal code attributes: In the Insert tab, you will see a group named Attributes. This group contains various attribute options.
5. Select postal code attribute: in the attribute group, find "Quickparts" and click the drop-down menu.
6. Open the "Field" dialog box: in the drop-down menu, an option named "Field …" will be displayed. Click an option to open the corresponding field dialog box.
7. Select postal code attribute type: in the field dialog box that pops up, there is a drop-down list named field name. Look up attributes related to postal codes in the list, such as "Address Block" or "Postal Code".
8. Confirm and insert the attribute: After selecting the appropriate postal code attribute, click the "Insert" button at the bottom of the dialog box to insert the attribute into the selected location in the document.
Through the above steps, you can find and insert the postal code attribute. Please note that the specific steps and options may be different for different versions of Word. If you encounter problems during operation, please refer to the help documents or online resources of the software, or consult the relevant technical support team for further consultation.