If you're an admin of the organization, you can turn Setup Mode on and off.
Step 1: Go to your Admin menu and select "Organization Settings".
Step 2: Select the "Rules" or "Constitution" tab. 
Step 3: Look for "Advanced" at the very bottom of the page and turn setup mode off /on from here.
For introductory information: What is Setup Mode?
For a video showing you how it works: How do I use Setup Mode? (video)