For some reason you want to change the orientation to make it go across a row instead.
How can you do that?
It is quite easy actually.
Highlight all the items in the List and Right-Click Copy them.
Then go to any empty cell and Right-Click 'Paste Special...'
Note: Make sure that you allow for enough space for the row to go across. Otherwise your data may be overwritten.
Tick the Transpose Option.
VOILA! Your new list is ready.