How would you be copy/pasting in a terminal emulator without a mouse? Any time I've seen someone do it it's: mouse to select, keyboard to copy, mouse to select

How would you be copy/pasting in a terminal emulator without a mouse? Any time I've seen someone do it it's: mouse to select, keyboard to copy, mouse to select other place, keyboard to paste. I cringe every time because it could be just: mouse to select, mouse to select and paste it in the other place with one click.