How did copyright affect printing press?

Answer 1

It's mostly the other way around: the printing press had a huge effect on copyright.

Back in the day, the Catholic Church controlled the movement of information, because they tended to be among the very few people who could read, and the only way to copy something was to have a monk painstakingly transcribe it. The Church and the government were pretty much okay with this, because it meant censorship was really easy.

Once moveable type was developed, the total number of books in Europe increased from several thousand to ten million in just 50 years. Censorship suddenly became comparatively difficult. The Pope then required printers to be licensed, and issued a bull against unlicensed printing. In 1535, the Catholic Church in France forced a law making the use of a printing press a hanging offense. Neither of these actions worked all that well.

In 1553, Mary I became the first Catholic English monarch since Anglicanism had been instituted, and a few years later she agreed with the Church that printing had to be limited (again, mostly for censorship), and gave the Worshipful Company of Stationers the exclusive right to print anything; this was called the copy right.