Measurement tools

You can measure objects in the image using any of the following Measurement tools:

	Select Allows to select existing measurement objects in the image.
	Lock tool When the lock is Open, the program returns to Select mode after performing a measurement using any of the tools below. Close the lock when you need to perform several measurements with the same tool.
	Unit Draw line (click two points) to define the unit of measurement.
	Length Draw line to measure a length or distance.
	Middle Draw line and mark middle point.
	Angle Click 3 points to measure an angle.
	Perpendicular line First click 2 points to draw a line. Next click a 3rd point to draw a second line perpendicular on the first line. The middle point of the second line is shown.
	Path Click several points to obtain a path and calculate its total length.
	Area Click several points to obtain an area (closed path) and calculate its surface area and perimeter.
	Center Click several points and find their common center assuming they form a circle.
	Circle Click a point to define the circle, move the mouse to the center of the circle and click.
	Rectangle Measures a rectangle.
	Marker/Counter Click in the image to place a marker.
	Marker/Counter Click in the image to place a marker.
	Magic contour Finds the contour of objects automatically.
	Color selection tool Select color for measurement objects.