Measure an angle:

1. Select the "Angle" tool in the list of annotations and ROIs. (See "How to create 2D annotations")





2. Bring your mouse above one image in a display area and click on the left button to define the extremity of the first segment of the angle.
3. Drag your mouse to define the corner point of the angle and click on its left button.
4. Drag your mouse to define the second segment of the angle and click on its left button.

The unit of the angle is the degree.
The value in brackets is the supplement of the angle (Information: The sum of the angle and its supplement equals 180 degrees).



Modify the angle object position:

1. Select the angle object by clicking on it with the left mouse button. When an angle object is selected, you can see a green circle at each extremity of its segments.
2. Keep your mouse anywhere between the two extremities of one of its segment, press the left button of the mouse and hold it.
3. While holding the left button of the mouse, drag your mouse to move the position of the angle object.
4. Release the left button of the mouse.

Modify the angle:

1. Select the angle object by clicking on it with the left mouse button. When an angle object is selected, you can see a green circle at each extremity of its segments.
2. Keep your mouse above one of the extremities of a segment (inside its green circle), press the left button of the mouse and hold it.
3. While holding the left button, drag your mouse to move the extremity of the segment.
4. Release the left button of the mouse.

The unit of the angle is the degree.
The value in brackets is the supplement of the angle (Information: The sum of the angle and its supplement equals 180 degrees).



Modify the angle value position:

1. Select the angle value by clicking on the value (but not on one of its segments). When a value is selected, it becomes highlighted in yellow.
2. Press the left button of your mouse on the value and hold it.
3. While holding the left mouse button, drag your mouse to move the position of the angle value. (The angle value and its supplement change alternately following its position).
4. Release the left mouse button.

The unit of the angle is the degree.
The value in brackets is the supplement of the angle (Information: The sum of the angle and its supplement equals 180 degrees).



Modify the properties of the angle:

1. Select the angle object by clicking on it with the left mouse button. When an angle object is selected, you can see a green circle at each extremity of its segments.
2. In the properties window of annotations and ROIs, modify the color or the width of the angle object.