These were often combined into a single return key, a convention that continues in modern computer word processing to insert a paragraph break (¶).
[1] The enter key is a computer innovation, which in most cases causes a command line, window form, or dialog box to operate its default function.
On ISO and JIS keyboards, return is a stepped double-height key spanning the second and third rows, below ⌫ Backspace and above the right-hand ⇧ Shift.
[5] On most ISO and other keyboards worldwide the return key is labelled solely with the ⏎ symbol across all platforms.
Historically, many computer models did not have a separate keypad, and only had one button to function as Enter or Return.
This is due to the frequency of usage (which also includes the space bar), and therefore, is kept large to reduce the likelihood of finger slips.