The GBLKVPD subroutine is a graphical call that deletes and releases the current blanking area. It enables graphics output to be drawn in the area previously blanked out by a call to the GBLKVP subroutine.

To release an area previously blanked out, as in the example for the GBLKVP subroutine, use the following statement.

/* define blanking viewport   */
call gblkvp({20 20, 80 80});
/* more graphics statements... */

/* now release the blanked out area */
call gblkvpd;
/*  graphics or text can now be written to the area */
/* continue graphics statements... */

See also the description of the CLIP option in the RESET statement.