This filter is found in
Filters->Render->Pattern->Grid.
It renders a Cartesian grid in the active layer, on top of the existing
contents. The width, spacing, offsets, and colors of the grid lines can
all be set by the user. By default, the lines are with the
Gimp's foreground color. (Note: this plugin
was used to create demonstration images for many of the other plugins.)
Tip
If you set the grid line widths to 0, then only the intersections
will be drawn, as plus-marks.
13.8.2.
Options
There are separate options for controlling the horizontal grid
lines, vertical grid lines, and intersections. By default, the
horizontal and vertical settings are locked together, so that
all changes are applied symmetrically. If you want to change
just one of them, click on the "chain" symbol below it to unlock
them. The results of changing the "intersection" parameters are
rather complex.
Besides, for some options, you can select the unit of measurement
thanks to a drop-down list.
Width
Sets the widths of the horizontal or vertical grid
lines, or of the symbols drawn at their intersections.
Spacing
Sets the distance between grid lines.
Intersection parameter sets the distance
from the actual intersection point for the starting points of the
line segments that represent the intersection, at center of
intersections.
Offset
Sets the offset for grid lines with respect to the upper left
corner. For intersections, sets the distance from the intersection
point to the ending points of the line segments that are drawn.
Color Selectors
These allow you to set the colors of the grid lines and
intersection marks.
Published under the terms of the GNU General Public License