ImageGear for C and C++ on Windows v19.10 - Updated
Protractor
User Guide > How to Work with... > Annotations > New Annotation API: ArtX > ArtX Annotation Marks > ART 3.0/ART 2.0 Marks > Protractor

The Protractor mark enables the end user to create an angle that displays the arc and the angle measurement.

Edit Mode

In Edit mode, end users create a mark as follows:

  1. Click the Protractor button.
  2. Drag the mouse to create the first line of the angle.
  3. Click to end the first line. This click creates the vertex and begins the second line.
  4. Click where you want your second line to end. The measured angle is complete.
  5. Right-click the mark after it has been created to activate the popup Edit menu.