SET NOPENDING DELETE

 Disables deletion of a select range when you use DELETE or type new text.
 (Default setting.)

 o  If you select text in the buffer, typing new text adds characters to
    the the select range, and using DELETE erases only the character left
    of the cursor.

 o  If you select the entire buffer (with the SELECT ALL command or by
    clicking MB1 five times), pending delete is disabled, to prevent
    accidentally erasing your work.

 Related topics:

    DELETE    RESTORE SELECTION    SELECT    SET PENDING DELETE