• Drawing Pen Control Practice Offers basic and advanced line exercise books, including straight lines, curved lines, and combinations of both. • Steps of the pattern For complex shapes, we provide the steps of this pattern to demonstrate how it is drawn step by step. • Three Practice Modes "Connect the Dots," and "Copy and draw" modes, ranging from easy to challenging, to master the line exercises. • Compare with the original image Overlay the original image with the practiced lines for a comparative analysis, allowing for correction of areas that need improvement in your drawing. • Save Practice Records Save your practice records and track progress through historical archives. • Share and Export Achievements Export practice records for achievement tracking, enabling pen control exercise tracking. If you have any questions or suggestions, please submit feedback within the app or contact us via email at tommytang998@163.com.