Recently updated and now I see this:

Questions

1. How do I turn off the section outlined in RED at the top of the search results"
2. How do I extend the search results to utilize the wasted area in the left and right columns.

Basically I want to remove the sidebars.

BTW... this is "uncentered" (that display option is working backwards for me.

If there are settings for these, it's not obvious to me. Appreciate any help!