The grid is non-printing horizontal and vertical lines covering image. The lines help photographer to align the basic elements of the photo vertically and horizontally. In case of portrait photography, they usually align shoulders and head slope.
The grid 3 x3 is the most used; it consist of two vertical and two horizontal lines. It is felt that if you look at a photo your eye is focusing its attention on the lines dividing image into thirds. Photographers call this the " Rule of Three Thirds". Images look more interesting and harmonious if the basic objects are placed at the borders of the thirds. For portrait photography, this rule is applied to reveal and emphasize the face features. As usual, the eyes and the lips are typically placed on the "attention" lines.
You can select type and color in the Set Grid dialogue. To open the dialogue, go to the Live View menu and select Set Grid.
Dialogue Elements:
Type is a list of the grid types. The list includes both the grids with the lines of different frequency and just the horizontal and vertical lines.
Color shows current color of the grid lines.
Change color open a system dialogue for color selection.
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It is the most convenient to select colors contrasting with image for the grid.
The result of the selected settings is shown in the picture below.
