Grid
This transformation lets you create a range of special effects from simple colored rectangles or rectangular cutouts to complex rectangular grid overlays. You can separately control the interior and exterior background colors and the number of major and minor horizontal and vertical grid subdivisions, and the major and minor line widths and colors.
Grid Rectangle
You select the grid rectangle by dragging the four corners, the four sides, or the interior of the rectangle displayed over the input image. The grid divisions will be confined to the rectangle you specify.
For greater precision in setting the grid rectangle, you can zoom the input image window.
Amount
The amount control lets you control how much of the high pass transformation is applied to the input image. You can apply a percentage of the transformation to the entire image, or you can specify an amount mask to restrict the effects of the transformation to only part of the input image.
Divisions
Using the Major Horizontal Divisions, Major Vertical Divisions, Minor Horizontal Divisions, and Minor Vertical Divisions controls, you can control the number of equally spaced grid lines within the grid rectangle.
Line Width and Color
Using the Major Line Width and Minor Line Width controls, you can set the width, in pixels, of the major and minor grid lines. The Major Line Color and Minor Line Color controls let you set the colors of the major and minor grid lines.
Interior and Exterior Transparency and Colors
You can set the transparency of the interior and exterior of the grid rectangle by selecting Transparent Background, Colored Interior, Colored Exterior, or Colored Background. If the interior or exterior is not transparent, you can select its color with the Interior Color or Exterior Color control.