Create a drop-down menu in Word with a "blank" choice

I wanted to create a drop-down menu for my letter template in Word below my signature with Enclosure as an option because I had caught myself forgetting to delete that word on a letter or two without one. (Oops!) I wanted the menu to include Enclosure, Enclosures, and a blank entry for those letters that don't have one. I used the drop-down selection in the Developer tab of Word 2010.

You can't create an actually blank entry in the Properties menu, though. So I found here that I could create one with just a single space. But when I tried that, when I selected the blank option, Word puts Choose an item in as a placeholder, and that gets printed.

So if you want to be able to select a blank entry on a drop-down menu, create two blank entries.

Selecting the first will result in Choose an item, but the second will be blank. I made sure to name my drop-down menu to ensure that when I select the blank one, I'll remember what that space is for.
I want my default to be that I don't have any enclosures because if I forget to change it, which is now a lot less likely with a drop-down menu, it will just be blank. Having a letter with enclosures that doesn't say so is better than having a letter without them say it does. And it's better than accidentally leaving the field as Choose an item., too.

To set the "default" in a drop-down menu in a template, just make the selection before you save the template. (Make sure you save the template and not a document created from it.)