# Propeller Blade Control Curve Interface

## Introduction

This tutorial introduces the propeller blade control curve interface including how to change the curve type, add or remove control points, interact with the curves, and changing values manually.  Note that a propeller with many control points will tend to update slowly so you should only use as many control points as needed to obtain the desired profile.  An imported BEM model will likely have too many points to function effectively.  However, you can choose an Approximate Cubic Bezier to significantly reduce the number of points and automatically convert to a Bezier curve.