Juniper Systems Allegro DOS Manual - Manual (Page 181)

MS-DOS Page 5-21
To delete a line, position the cursor anywhere on the line to be removed
and press the key. The line is deleted and the lines below it move
up. The line just deleted is placed in a buffer until another line is deleted
and takes its place. The last line deleted can be pasted back into the
document using the undelete line command, .
Undeleting Text
Text deleted with the or key can be restored at the cursor
location as long as the cursor has not moved to another line. (Once the
cursor is moved using the arrow keys the text is lost and cannot be
recovered.) To undelete the removed text, press the key. Text
removed using (clear to end of line) cannot be recovered.
Lines deleted using the key can be pasted back anywhere in the
document by pressing the key.
Working With Blocks of Text
To mark a section of text as a block, press , the mark command, and
use the arrow keys to block the text. Blocked text is displayed in reverse
video.
Blocks of text can be cut (saved in a scratch buffer), pasted (copied from
the scratch buffer to the current cursor location), or sent to a line printer.
To cut a block of text once it has been marked, press , the cut
command key. The text is saved in a buffer and removed from the
screen. The text to the right of the block is shifted to the left.
To paste a block of text from the scratch buffer, position the cursor
where the text should be inserted and press , the paste key.
To print a block of text, you need to select a block of text and press
, the print key, while the block is marked. The marked text will be
sent to the printer.
To copy a block of text, first mark it, and then cut it, then paste it back in
the original position. Now you can move the cursor to where you want
the block copied and paste it again.