Getting Started with AreaCalc for Burns
From EHS Help
Area Calc opens with a Lund and Browder image displayed.
Choose "Paint Brush" or
"Fill" located on the left of the app to enter detail in to the image.
Choose Delete Brush or
Delete Fill to Delete detail.
Use the zoom in, Zoom out and back to normal buttons to add finer details.
Once zoomed in on the image the click the right right mouse button to pan image, alternatively and for tablet use, the will pan the image with left mouse button or finger.