Some reading material for you. Being an ass is already annoying, but being an as...

Some reading material for you. Being an ass is already annoying, but being an ass without even primary school level knowledge of the topic at hand is unacceptable.

PDF: https://en.wikipedia.org/wiki/Vector_graphics

Screenshot: https://en.wikipedia.org/wiki/Raster_graphics

See also: aspect ratio, custom print CSS, webpages that are longer than one screen height (all of them!)