Once you are logged in to your account click on the "Features" tab on the side bar.

Then click on "Fence Sections".

Click on "Add Fence Section" located on the top right hand corner. 

Fill out the required fields and click on "Map". (Under the "Source" field choose "Drawn".)

Left click on the map to start drawing your fence section.

Left click to continue or double click to finish drawing the line.

Once finished drawing the line, close out the map.

Then click on "Save". 

A message will appear confirming that the Fence Section has been added successfully.