A vertical line appearing only when using the ADF (Automatic Document Feeder) is a common issue and usually indicates a small mark or debris on the ADF scan strip, a narrow glass strip next to the main scanner glass. Even if you've cleaned the main glass, the ADF strip might still have smudges or dust that cause this line. Here's how to fix it:
I get a vertical line when using the feeder - HP Support Community
We’re very glad to hear that replacing the tri-colour cartridge resolved the vertical line issue on your prints. Older or partially dried ink cartridges can sometimes cause print quality problems such as streaks, faded areas, or lines, especially when the printer hasn’t been used frequently for photo printing.
Is there a single, more generic term that can be used to describe both a row and a column? In English, we can refer to a line as being horizontal or vertical, but unless we say ‘a line of something’,
To speak of a vertical row would seem somehow perverse. It would seem far more meaningful to speak of arranging things in a vertical line—to distinguish this line from some other possible line in a different orientation. (It might seem even more normal to speak of columns, but that is outside the scope of this Question.)
MSN: Horizontal vs vertical lines: A simple student guide with easy diagrams and examples
Whether you are sketching graphs in mathematics, understanding directions in geography, or reading blueprints in design class, horizontal and vertical lines are concepts you cannot avoid. They form ...
Horizontal vs vertical lines: A simple student guide with easy diagrams and examples