He shifted his position from the horizontal.

他从水平姿势变换成其他姿势。

《牛津词典》

The walls and floors of the building, called panels, are cast in a horizontal or vertical position.

建筑的墙壁和地板被称为嵌板，是在水平或垂直的位置铸造的。

youdao

Position precedence rule. When resolving the float box position, the optimum vertical constraint takes precedence over the optimum horizontal constraint.

位置优先原则：在判断浮动框位置时，最佳垂直限制优于最佳水平限制。

youdao

To compensate, some manufacturers will even slightly alter the geometry of a commuter cycle, perhaps tilting the seat post at a different angle, but that could potentially lead to shorter riders being forced into a more hunched or horizontal position.

ENGADGET: Engineering a better bicycle with DBC City Bike Design Alt

Unfortunately, tragedy can strike with as simple an act as brushing one's elbow across the table, and that's all it took for me to knock my smartphone right onto a hard surface -- facedown in a perfectly horizontal position (the worst imaginable angle).

ENGADGET

The main outer handles feel very similar to what you'd find on a bike, and they can even be shifted to a horizontal position for motorcycle racing by sliding two tabs that rest near your thumbs -- the right handle can even be used a twist throttle, but it's dependent on title support.

ENGADGET: Sony PlayStation Move Racing Wheel hands-on (video)