Focus Tool 
The
Focus Tool focuses the camera at a specific location and gives the
measurement. Click on
the focus tool and drag 'n' drop it onto the image viewer. The value
will appear inside a box. As you grab the point
and move it around
the camera focus will change accordingly. You can also drag one
of the eight smaller boxes located on the box around the focus
value to change the shape/size of the area being focused.
Right-click
on the focus area to bring up the IPFocusEntity edit box, as
seen below. Selecting
the Entity tab allows you to adjust the colors, thickness and
visibility of the focus marker. You can also select a
Coordinate System. Make the necessary adjustments, click
Apply and then Close. The values will be updated according to
your selections.

Selecting
the Render Style
tab allows you to adjust the colors, font, style and appearance of
the value placed inside focus marker. Make the necessary
adjustments, click Apply and then Close. The values will be updated
according to
your selections.

Selecting the Rectangle tab allows you to enter specific
values for the focus rectangle used, including center X, Y, width, height and aspect of width/height. After entering your
values, click Apply and then Close. The focus value will be recalculated
according to the selections.
