Juniper Systems Allegro DOS Manual - Manual (Page 180)

Page 5-20 MS-DOS
Function Keys
The function keys are used for editing files as follows:
Function Description
F1 Paste
F2 Mark
F3 Undelete Line
F4 Undelete Character
F5 Print Block
F6 Cut
F7 Delete to End of Line
F8 Delete Line
F10 External Display
Esc Exit
Ins Insert
Inserting and Overwriting Text
You can enter text in insert mode or overwrite mode. Insert mode is the
default. The word “Ins” is displayed at the bottom right corner of the
display.
To insert text, position the cursor at the point where the new text is to
start and begin typing. The existing text moves to the right as new text is
inserted.
To switch to overwrite mode, press the key. The word “Ins”
changes to “Ovr” and the cursor changes to a block cursor. In overwrite
mode, all the text to the right of the cursor is overwritten with new text.
To switch back to insert mode, press the key again.
Deleting Text
Text can be deleted one character at a time or one line at a time. To
delete the character at the cursor, press the key. The character is
removed from the screen, and the text from the right is shifted left one
character. To delete to the left of the cursor, press the
(backspace) key.