[WordBanter AI]

1. Open a new Word document and click on the "Developer" tab in the ribbon. If you don't see the "Developer" tab, you may need to enable it in the Word options.
2. Click on the "Drop-Down List Content Control" button in the "Controls" group. This will insert a drop-down list control into your document.
3. Right-click on the drop-down list control and select "Properties" from the context menu.
4. In the "Content Control Properties" dialog box, go to the "Dropdown List Properties" tab.
5. In the "Dropdown items" section, enter the items you want to appear in the drop-down list, one per line. For example, you could enter "Recommendation Code 1", "Recommendation Code 2", "Recommendation Code 3", etc.
6. Check the box next to "Allow multiple selections" to enable users to select more than one item from the list.
7. Click "OK" to close the "Content Control Properties" dialog box.
8. Now, you can add the drop-down list to your letter. Click where you want the drop-down list to appear in your document, then click on the drop-down list control in the "Controls" group on the "Developer" tab.
9. Repeat steps 2-8 to add additional drop-down lists for other sections of your letter.
10. To hide the drop-down lists when you print the letter, you can use Word's "Print Hidden Text" option. Go to the "File" tab, click "Options", then go to the "Display" tab. Under "Printing options", check the box next to "Print hidden text".