[Documentation:TAGrading] Multi-Grader Annotations

_docs/grader/rubric_grading/image_annotation.md

@@ -16,3 +16,22 @@ Annotations can be handwritten using a touchscreen, digital tablet, or mouse,
 or they can be typewritten in textboxes places on the image.
 
 ![](/images/ta_grading/rubric_grading_image_annotation.png)
+
+## Viewing Annotations from Multiple Graders
+
+If more than one grader annotates the same image, the student can see each
+grader's annotations. On the results page, under *Annotated Feedback*:
+
+- **View Popup** has a button for each grader (*Grader 1*, *Grader 2*, ...)
+  and an *All Graders* button, which shows every grader's annotations on one
+  image. Annotations from different graders may overlap.
+
+  ![](/images/ta_grading/rubric_grading_image_annotation_all_graders.png)
+
+- **Download** asks the student which version to save: a single grader's
+  annotations or *All Graders Combined*.
+
+  ![](/images/ta_grading/rubric_grading_image_annotation_download.png)
+
+If only one grader annotated the image, **View Popup** shows the annotated
+image and **Download** saves it directly.