Draw a Cloud
Click Viewpoint tab > Save, Load & Playback panel > Saved Viewpoints drop-down, and choose the viewpoint that you want to review.
Click Review tab > Markup panel > Draw drop-down, and click Cloud
.
Click in the viewpoint to begin drawing the arcs of the cloud. Each time you click, a new point is added. Clicking clockwise draws regular arcs, clicking counterclockwise, draws inverted arcs.
Before a cloud can be saved with a viewpoint, it needs to be terminated correctly. To terminate the cloud, right-click in the Scene View.