I don't think they do.
Not sure what you mean... They are horizontal, not vertical, meaning they lie flat on the Earth.
vertical/horizantal
I believe you are confusing "horizontal" with "vertical". "Vertical" means "from top to bottom", or "upright". "Horizontal" means "from left to right", or "lying".
In the North America
yes!
yes!
This is true. All continents are at least in one vertical hemisphere (Northern or Southern) and one horizontal hemisphere (Western or Eastern).
cursor
Obejects on a painting that appear high seem farther and those that appear lower in the picutre seem closer.
The blinking vertical light is called the cursor, I-bar or Insertion Point.
cursor
cursor