| 1. Go into Dashboard.|
2. Click on Layout.
3. Click on Edit HTML.
4. At the far left bottom under the template,
5. Click where it says, "Revert to Classic Template."
6. There is also the option below it to "View Classic Template".
See also Peter's post on reverting or Chuck's post on it.
CAUTION: You will probably lose your page elements if you revert to the Classic template. Although it's possible to then "upgrade" to the Layout template again, you won't get your page elements back. What's lost will probably stay lost.
See the post concerning this hazard at When Reverting to Classic Template Was A Big Mistake"
An associated topic is at Revert To Never Never Land.