My Pathomation comes with a set of tools to annotate and draw on your slides have been updated. The available tools are listed here:

1) Straight line & measurement tool
2) Arrow & text tool
3) Circle tool
4) Square tool
5) Freehand line and measurement tool
6) Closed freehand tool
7) Text tool

An illustration of the results is shown here

The annotations you make on a slide will persist if you include this slide in a collection, slide box or course.

The line tool will show you the length of the line, and the area tools will show the area inside the annotation you have marked out. If you want to make a quick series of distance measurements that do not need to be stored, you can use the measurement tool. A video explanation of this can be viewed at https://youtu.be/AfVNdafwNMw