If you want to block the access to your website, you can deactivate all the tabs of your menu. To do this, you have to:
Edit the menus of your website
Click on the pages that you want to to disable (one by one)
75. How to copy-paste a text without having layouts problems?
The cell editor does not take the formatting into account when you copy and paste a text. It is therefore possible that you may have a different display between the text you have copied and the one that appears on your site.
If you don't want to write your text entirely, you can:
Copy your original text
Paste it on a notepad application on your computer (to remove the original formatting)
Copy the text from the notepad (or keyboard shortcut CTRL + SHIFT + V)
Paste the text in your cell editor on your website.