The ROI Grid is a unique grid ROI.
Each box in the grid has the same properties as an individual
square ROI. That is, a point can be found at the center and ROIs
from other tools can key off that point or the dimensions of an
individual box in the grid.
When the ROI box
is selected it will
turn red and 9 smaller boxes will be placed around the ROI so you can
resize it.
If you hold CTRL
down when resizing the
ROI will maintain a perfectly square shape.
If you
right-click inside the ROI it
will display the ROI property page. On the "GeoGrid" page the
grid size can be set. Use the X and Y dimensions to set the
number of boxes in the grid.
On the "Display" tab:
The "Color" and
"Highlight color"
options allow you to change the color of the ROI box.
The Thickness
allows you to change the
width of the ROI box line. The higher the number the thicker
the
line.
The Coordinate
system controls how the
ROI understands where it is on the screen.