I seemed to have suddenly and inadvertently changed the way Windows Explorer looks. Restore Default option found in folder options does not have any impact on the window i wish to change back to normal. Select a file to preview is half the size of the windows explorer and it looks dumb, not to mention each file or folder that is selected or highlighted will show it's contents in that section. and that's pretty dumb. i have no clue what key i pressed to make this happen while i was typing something.