Editing VT52 (section)

=== VT52 ===
The VT50 was soon replaced by the greatly upgraded VT52. The VT52 had considerably larger buffers, giving it the capacity to store not only a full 24 lines of text that better utilized the screen space, but also the text off the top and bottom of the screen. This allowed the terminal to scroll backwards a limited amount without having to ask the host to re-send data. Another significant upgrade was that the VT52 included lowercase text support.{{sfn|DECscope|1975|p=11}} Many new commands and features were added:{{sfn|DECscope|1975|pp=12-30}}

* Support for the {{key|:}}, {{key|~}} and {{key|&#125;}} characters, when the shift key was used with {{key|;}}, {{key|`}} or {{key|&#123;}}, respectively.
* Typing on the numeric keypad could now be distinguished from the main keyboard by turning on Alternate-Keypad Mode. This returned multi-character codes, {{key|ESC}}{{key|?}}{{key|n}} through {{key|y}}.
* New cursor control codes to support host-directed full-screen editing and a [[WYSIWYG]] display.
* A "graphics character set" which included several less-common characters as well as the ability to print some fractions in-line, like {{frac|3|7}}.

One notable feature was the introduction of a separate function keypad with the "[[Gold key (DEC)|Gold Key]]", which was used for editing programs like [[WPS-8]], KED, and [[EDT (Digital)|EDT]]. Pressing the Gold Key and then typing one of the keys on the keyboard sent a command sequence back to the host computer.