10.15.5 Reset Mail's Search Preferences - How to Search the Entire Account?

10.15.5 Reset Search the Preferences in Mail.

I installed the Catalina 10.15.5 updates on my Mac, and need to be able to search my entire Mail - not just the mailbox that is selected.

So, without researching this, how do I search the entire eMail account?

It took me a while to get it to search the entire account.

Now it is back to only only searching the mailbox I select.

Any thoughts would be great.