You can lock and unlock pages whenever you wish. However if you just don't want the page to be visable on your website it may be better to simply hide it. I have detailed below instructions to do both.
Locking pages
1. Log into the website control panel
2. Click Step 3 webpages
3. Scroll to the bottom of the page and click "Lock Your Pages"
4. The following video will explain the different locking levels available
Website Builder | Build a Website | Create a Web site | security : Reason8
Hiding Pages
1. Log into the website control panel
2. Click Step 3 Webpages
3. Click "Organise pages"
4. In the column to the right, select the page you wish to hide by clicking on it once.
5. Click "Remove" (Simply removes the page from your navigation buttons)
If at a later date you want to replace the page simply drag a copy of the name from the left column to the right while in Organise pages. The short video in this section will show you in more detail how.
We hope this is helpful,
Reason8 Support