Draw a String of Lines
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 Line String
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Click in the viewpoint to begin. Each time you click, a new point is added to the line string. When the string is complete, click the right mouse button to end the line, and you can then start a new line string.