Switching blocks (left side) on or off

As an example, here are instructions on how to switch off the News aggregator. Other blocks can be switched on and of accordingly.

1. Click on: My account
2. Click on: Edit
3. Scroll down to: Block configuration
4. Remove the check mark from: News aggregator
5. Remove the check marks from the three news categories: Elephants category, etc.
6. Scroll down further, to the end of the page.
7. Click on the [Submit] button.

If you want them back, or just one of them, you can go through this procedure again and enable whichever you like.