By Layout: Assign a curve library to alignment in a layout. The assigned Curve library will be updated based on the alignment in the layout.

By Select: Assign a curve library to a line object.

By Draw: Draw a line and at the same time assigns a curve library to the line. The draw function comes with some of the sketch functions.

Layoutwise: If it is checked on, the whole alignment will be selected as one line and a curve library will be assigned to the whole layout.

Options
The options below are activated when ‘Assign library> By Layout or By Select’ is selected.
- From Start: Assign a curve library in a forward direction (from the start to the end).
- From End: Assign a curve library in a backward direction (from the end to the start).

Offset-y: Apply offset value in the y-axis based on the line to assign.

Offset-z: Apply offset value in the z-axis based on the line to assign.

Rotation-x: Input the rotation angle in the x-axis(Based on the positive direction of a line object to be assigned).

Rotation type
- All: Rotate all Beta angles of offset curves and single curve constraints in each object respectively.
- Rot. Offset: Only rotate the offset curve for each object in a curve library.
- Rot. Obj.: Only rotate the Beta angles of the single curve constraint.

Bounding Box - All: The preview that the smallest one box shows a box shape that wraps all selected objects will be displayed.

Bounding Box - Each: The preview that the smallest shows several boxes wrap each selected object will be displayed.

Original Model : The preview the same as shows the original shape will be displayed.