05-21-2018, 11:27 PM
You need to pick the "ghost" version of the decorations, and once they are built you get that option. (It's also the step you must take if you want to delete them).
I'm not sure that's something that's available for all the decorative things from <abbr title="MegaMod">MM</abbr>, but should be in <abbr title="Colonial Charter">CC</abbr>.
