Finder hiding items under a grey box in list view In Mojave, when I open a finder window, I don't see all the requested columns displayed.

For example, the finder should open for the desktop and look like this:



However, I see this:



Which looks like a window within the finder window is not wide enough to display my columns.

So, I resize the window and columns.
I delete all the .DS_Store files on my Mac.
I save the new finder window setting as the default.
Then when I open a new finder window, I have the same problem.

How do I remove this overlay ?
Go in Finder to View and select "Hide Preview"