When set to a non-zero value, empties the grid of data. In addition, any ROW-COLOR, ROW-FONT, CELL-COLOR, and CELL-FONT settings are cleared. The cursor is positioned at the home cell (the home cell is the uppermost, left-most, non-heading cell), and the grid is scrolled to the home position. RESET-GRID is a one-time action. Note that this clears the headings as well as the body of the grid. Also note that both text and bitmap data are cleared.