GRID
This command overlays horizontal and vertical gridlines over the image. The gridlines are one pixel thick.
The origin for the gridlines is the upper left corner.
The "Start offset" determines how far the first gridlines will appear from the upper left corner.
The "Spacing" specifies the number of pixels from one gridline to the next.
Different horizontal and vertical values may be entered for "Start offset" and "Spacing".

To specify the gridline color:
- for palette images, type a palette index or point at a color in the image or in the palette box.
- for RGB images, hit the Color Picker button or the color swatch or point at a color in the image.