SHOW LINE
The user may identify any existing line or line direction using this function. The selected line is highlighted and the starting point is labeled with a circle. The subsequent points are represented with arrowheads and the number of points on the selected line is given in the prompt window.
There are two ways to show a line:
1. LINE
Select line by cursor.
2. KEY IN LINE NO.
Enter the line number in the dialog window; then select OK.
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