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9. LINE FEED.
When the CUR CTL - OFF switch is set to CUR CTL, the code generated by LINE FEED causes the cursor to move non-destructively to the same character position in the line immediately below the current line, and "LF" is transmitted to the computer. When LINE FEED is executed with the cursor on the bottom line, the entire display scrolls upward one line and the cursor remains stationary. When the CUR CTL - OFF switch is set to OFF, all data entry is on the bottom line, LINE FEED causes the entire display to scroll upward one line, leaving the cursor positioned on the new bottom line.
11. RUB.
When the RUB (rubout) key is typed while holding down the SHIFT key, a non-displayable rubout code (ASCII DEL) is transmitted to the computer. The cursor is not advanced and the character code stored in display memory is not overwritten. RUB is normally used to tell the computer that a previous character should be deleted.
12. REPEAT.
When REPEAT is held down while holding a character key, the character (or control function) is repeated at the rate of 12.5 per second. (If the terminal is operating at a baud rate that will not permit 12.5 cps transmission, the repeat rate is reduced to the transmission rate.)
14. HERE IS.
If the Answer Back option is installed, typing this key transmits an identification message (stored in a special ADM-3A memory) that identifies the terminal and alerts the host computer that a message is to follow. If no Answer Back option is installed, the key has no function.
15. BREAK.
This key activates the standard teletypewriter BREAK function, normally used to interrupt an incoming message.
16. CLEAR.
Typing the CLEAR key while holding down the SHIFT key clears the entire screen to spaces. (This function may be disabled by setting the DISABLE - CLR SCRN switch to DISABLE.)
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