Using the Angle Tools

You can use the Angle and Split Angle tools to measure the angle between any two lines, as shown below. For split angles, the angle that would exist between the line segments if they were extended far enough to intersect will be calculated.

Measured angles

Measured angles

Measurements are shown with the annotation in 2D views and are also available in the lower section of the Data Properties and Settings panel.

See Annotation Properties and Settings for information about changing the visibility of angles and their assigned color, as well as other options available for annotations.
How to Add a Simple Angle
  1. Maximize the required image, recommended.
  2. Click the Angle tool in the Annotate panel.
  3. Click and drag to create the initial side of the angle.
  4. Click and drag from the vertex to create the terminal side of the angle.

    The angle measurement is indicated at the vertex and in the lower section of the Data Properties and Settings panel.

How to Add a Split Angle
  1. Maximize the required image, recommended.
  2. Click the Split Angle tool in the Annotate panel.
  3. Click and drag to create the initial side of the angle.
  4. Click and drag to the level of the terminal side of the angle.
  5. Click and drag to create the terminal side of the angle.

    The angle measurement is indicated at the vertex and in the lower section of the Data Properties and Settings panel.

If required, you can edit an angle.

How to Adjust an Angle
  1. Select the required angle, either directly in the 2D view or in the top section of the Data Properties and Settings panel.
  2. Click inside the control point you need to adjust and then drag.

    You can also select multiple control points. For example, if you need to move a side of the angle.

  3. Click inside the selected control point(s) to de-select it.
How to Move an Angle
  1. Select the required angle, either directly in the 2D view or in the top section of the Data Properties and Settings panel.
  2. Select any line between its control points and then drag to reposition the angle.

You can customize the appearance of angles and their captions in the Properties box, shown below.

Angle properties

Angle properties

Angle properties

  Description
Thickness Indicates the thickness (in screen percentage) of the contour that defines the shape of the annotation, including its control points.
  • Enter a new number in the edit box to change the thickness of the contour lines.
Show captions If selected, a caption will appear with the annotation. Options include:

Angle… If selected, the measured angle will be shown as the caption.

Custom… If selected, the caption entered in the Caption edit box will be shown.
Floating caption If selected, the caption will appear in a floating box that can be repositioned manually anywhere within the view to avoid overlapping.
Font size and style Lets you increase or decrease the font size of the caption with the Increase font size and Decease font size buttons, as well as choose a font style.
Control point size Lets you set the size (in screen percentage) of the annotation's control points.
  • Enter a new number in the edit box to change the size of the control points.
Control point appearance Let you choose a shape — circle, square, triangle, cross, or 'X' — for the annotation's control points.
Angle Indicates the measured angle.
  • Enter a new value in the Angle edit box to change the angle of the annotation. You can also adjust angles by dragging a control point.

The following tools are available for angles.

Angle tools
    Description
Split angle Lets you convert an angle to a split angle.

A number of configured actions and keyboard shortcuts are available for creating and editing angles. The default settings for these actions are listed in the following table.

Default configured actions for the Angle tools
Action Key Mouse
Create an angle in Angle mode   Left mouse
Edit an angle in Angle mode   Left mouse
Create a split angle in Split Angle mode   Left mouse
Edit a split angle in Split Angle mode   Left mouse
Switch to Angle mode A  
Switch to Split Angle mode Left Ctrl + A  
See Configurable Actions for information about modifying the default actions for the Angle tools.