Vertical, right down the middle.
And now that "Country House Mystery" has been called, I actually do have an incentive to also finish my last bingo book -- Sharyn McCrumb's She Walks These Hills -- fairly soonish after all, as a "Supernatural" call now will give me another immediate bingo, too.
"Virgin" card posted for ease of tracking and comparison.
Black Kitty:
Read but not called
Black Vignette:
Called but not read
Black Kitty in Black Vignette:
Read and Called
Black Kitty Center Square:
Read = Called
(Note: Physical print editions unless stated otherwise)