Canon PIXMA MG6320 Online Manual page 158

Note
The effect level can be changed by moving the slider displayed below Blur Background.
When the cursor is moved over the Preview area, the shape of the cursor changes to
5. Specify the focus area (area that will not be blurred) with a line by clicking along its
outline.
Note
You can select whether to detect the outline automatically, by clicking
and Select the Area) on the Toolbar.
When the "Detect the outline and select the area" mode is selected, the outline near the cursor is
automatically detected, enabling you to specify the area along the outline.
Specify the area while pressing the Shift key to temporarily cancel the "Detect the outline and
select the area" mode.
When the "Detect the outline and select the area" mode is canceled, a clicked point and the next
clicked point will be connected with a straight line.
Press the Delete key to undo the specified points one at a time.
6. When you finish surrounding the area, click the first point.
When you place the cursor over the first point, the cursor changes to
you click it, the first and last points are connected and the focus area is specified.
(Pen).
(Detect the Outline
(Start Point of Area). When