Split a circle into two semicircles

Draw the circle

To learn how, visit this link:

Draw a circle - (Circle Tool)

Select the "Split Tool" in the top toolbar.
Or you can press the "S" button on your keyboard.

In Map View, you will see the cursor is transformed into scissors.
Hover over a location on the edge of the circle.
You will see the cutting guide appear and extend to the opposite location on the edge of the circle.
Split the circle by clicking on the cutting guide.

(Optional) You can now move the two semicircles to new locations in Map View.
1. Select the "Edit/Measure Tool" in the top toolbar.
2. In the Map View, click-and-drag the semicircles to new locations.
(Optional) You can now edit points on a semicircle’s round edge.
1. Select the "Edit/Measure Tool" in the top toolbar.
2. In the Map View, hover over the semicircle’s round edge.
  You will see the points appear.
3. Click-and-drag a point to a new location.