You can make Annotations using the Polyline, Line or Elevation tool. Click to place control points, and double click to finish the Annotation.
After you create the Annotation, you can edit the name on the label that appears over the Annotation, edit the control points, or delete the Annotation.
Creating an Annotation creates a new template in the left hand side of the screen, with Volume, Elevation and Area Measurement Tools. If one of these Measurement Tools is selected, the Annotation label will not be visible; so deselect the Measurement Tool to edit or delete the Annotation.
You can also promote to Site level or delete Annotations by hovering over the Annotation in the list of Annotations on the left hand side of the page:
If you create the Annotation in Map View, your measurement will be available for download as a CSV file. If you create the Annotation in the Photo View, it will be available for download as a PDF file.