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I'm studying this tutorial:

https://learn.arcgis.com/en/projects/get-started-with-arcmap/lessons/predict-the-impact-of-the-proposed-road.htm

But I can't complete the "Digitize the proposed road" section.

When I use the "Trace" and the "Straight Segment" tools, at the end of the drawing I have those "areas" and not just the segments that I would need (you can see the difference looking at picture at point 16 in the previous link):

Is there some option I should be turning off?

What are those areas?

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    Is it possible that you are digitizing into a polygon layer rather into a polyline layer? A snapshot that includes your table of contents, or digitizing tool set will help to provide solution. – dof1985 Jul 10 '16 at 11:32
  • I changed the picture. Now you can see TOC, Editor, Creature Features / Construction Tools panes. – CharlesM Jul 10 '16 at 13:19
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    now it is clear that you are digtizing a polygon, thus the area. Create a new polyline layer and digitize a riad with trace. – dof1985 Jul 10 '16 at 13:39
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In one of the tutuorial steps you created a new feature class. The instructions in the tutorial (step 3) say to create a Line feature class

Under Type, choose Line Features

however it appears you have created a Polygon feature class. You can see this in your screenshot where the symbol next to your new layer shows a polygon shape rather than a line shape.

Your new layer showing a Polygon shape symbol:
enter image description here

Should look something like:
enter image description here
(from a screenshot further down in the tutorial)

You will need to remove your new layer and redo the Create a new Feature Class steps to create a line feature class.

Note the drop-down option set to "Line Features" from the tutorial step 3:
enter image description here

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