[Arrow On] command shows arows to display direction of selected curves or surfaces.
For the prompt
Specify Objects
select curves or surfaces to show the direciton. Multiple objects can be
selected.
On the selection of curves or surfaces, arrow will be shown.
For curves, arrows indicate their tangent direction at the positions.
For surfaces, red arrows indicate U parameter line direction, green arrows indicate V parameter line direction, and white arrows indicate normal direciton at their position.
Arrows stay displayed after the command terminates. To erase the display, use Clear All Analysis Display.