When a rigid piping style is active and all elements show on the 3D Orthogonal Route display, you can:
The different elements in the 3D Orthogonal Route display for rigid pipes with fittings include:
Shows valid direction for the next route point. Click the line to add a node in that direction. Together with Point Snap, you can define a work point on the axis direction from referenced geometry.
Shows the rotation possibilities for the next route point and enables the free rotation. Together with Rotation Snap, you can rotate the direction axis to an orientation from referenced geometry.
Changes direction in 45-degree increments. This option is available only when 45-degree route direction is set for the active style.