A special poll is a poll that contains additional customizations added by the admin.
First tap the blue plus button at the bottom of your screen to create the poll. Next fill in the title and then choose your date and time options. Add a location, and some notes to inform everyone what's going on.
Scroll down the page slightly, to click on "setting". Here you will see a page where you can enable the special settings you need.
Click on "settings" underneath the "location" and "note" section. Here you will see a page where you can enable the special settings you need.