Segments, Angles, and Curves

Select a Tool

• Click a button from the first column of the table in the toolbar
or
• Press the key from the last column of the table on the keyboard

Buttons located in the same groups are highlighted with the same color

Button	Function	Mouse	Keyboard
"Segments" Group
	Length	Click at the start and end points of the segment Hold down the key to draw a strictly horizontal or strictly vertical segment	or
	3D Segment, available only in 3D modes	Click at the start point of the segment, scroll the images with the mouse wheel, click at the end point of the segment	For details, see 3D Measurements
"Angles" Group
	Angle	Click on three points
	Open Angle, Cobb Angle	Click at the start and end points of one side of the angle Click at the start and end points of the other side of the angle	+
"Curves" Group
	Curve	Click on the points of the curve, double-click at the end of the curve Right-click on the constructed curve to add a point inside it To add a point at the beginning or end of the curve, use the "More" item (see Measurement Manipulations) Click on the first point to close the curve
	Polyline	Click on the vertices of the polygon Click on the first vertex to close the polygon
	Pencil, or Pen for freehand drawing	Click at the starting point Move the mouse to draw a freehand curve Click at the end point
	Ortho, available only in 3D modes	Click on the points of the curve, double-click at the end of the curve	For details, see "Ortho" Program
	3D Curve, available only in 3D modes	Click on the points of the curve, scrolling the images with the mouse wheel, double-click at the end of the curve Right-click on the constructed curve to add a point inside it To add a point at the beginning or end of the curve, use the "More" item (see Measurement Manipulations)	For details, see 3D Measurements

• To cancel a measurement while building it, right-click
• To cancel the measurement construction and return to the default tool, press the key on the keyboard

To edit measurements, see Measurement Manipulations