procedure DoLineFeed;
Moves the cursor down one row.
This method has two modes of operation, distinguished by the value of UseNewLineMode. If UseNewLineMode is False, the cursor is moved down a row, staying in the same column. If the cursor is in the bottom row when this happens, the screen or scrolling region is scrolled up. The new row so formed is initialized to space characters using the current colors and attributes.
If UseNewLineMode is True, the cursor is moved down a row in the manner already described, except this time it is moved to the first column.
This method is limited to the current scrolling region.
See also: DoCarriageReturn