The only example of a wrapper I could find in a default install of Orchard was "Widget.Wrapper.cshtml". Based on that, plus the documentation, I created a zone wrapper called "Zone-AsideSecond.Wrapper.cshtml" and gave it these contents:
<p>Just a test</p>
I placed the file into "~/Themes/MyTheme/Views", but apparently it isn't being recognized because there is absolutely no change to the appearance of the site. What am I doing wrong?
I also noticed that the theme I created has a "Zones" folder. I had also tried to place this wrapper file there, and that didn't help either.