This command displays the unconnected points in a sketch.

1.

Click  button on the toolbar or click Tools > Sketch Tools > Highlight Disjoined End.

2.

You can see the highlighted points and it means that created 2D sketch is not closed.

Note

If you cannot create extrude or revolve body from 2D sketch, first, you need to check whether 2D sketch is closed or not using Highlight Disjoined End command.