Dir

Toolbar	Menu
Analyze Main Main2	Analyze Direction

Toolbar

Analyze

Direction

The Dir command displays and edits an object's direction or normal direction.

Select objects.

Arrows show the directions on curves or normal directions on surfaces.

If a single object is selected, move the cursor on the object to inspect the direction at the cursor location.
Click the mouse button on an object to flip (reverse) the direction for that object.
The command-line provides more flipping options.

Command-line options

Reverses the direction.

Reverses the directions on all selected curves.

Reverses the U or V direction.

Exchanges the U and V directions.

Reverses the normal directions on all selected surfaces.

Cycles through the Mode options.

Reverses the U or V direction for all selected surfaces.

Reverses the normal direction for all selected surfaces.

Exchanges the U and V directions for all selected surfaces.

Closed polysurfaces, surfaces, and lightweight extrusion objects cannot have their normal direction facing toward the interior of the object.
The direction and normal direction arrow color is controlled by the Tracking lines setting in Appearance: Colors Options.

Their size is controlled by the Direction arrow icon settings in Appearance Options.
Search for "DirectionArrow" in Advanced settings to access more arrow appearances.
The status bar displays the parameter value at the cursor location when a single curve is selected, and the draft angle when a single surface is selected.