The word hardcopy, like the more colloquial screenshot or the less common word screendump, refers to the printout of the current monitor image to the printer. For the printout, the computer user only needs to press a corresponding key or key combination and the monitor image is sent directly to the printer and printed out.
With the C64 this only works with additional software, which is either loaded beforehand or implemented in a corresponding cartridge. Many computer magazines such as 64'er and floppy disk magazines such as INPUT 64, Magic Disk 64, etc. published many listings and programs, which are mostly only adapted to certain printer models.
Nowadays, modern computer systems like PC are equipped with software tools which allow a more comfortable processing of the screenshots before they are printed or saved.