Learn techniques for cleaning up line art in Sketchbook Pro through this narrated 20-minute tutorial. Discover how to create thumbnails and refine them using layer methods or soft erasing and redrawing, mimicking traditional art techniques. Gain insights into the workflow of professional artist Robert Marzullo as he demonstrates his process for creating polished digital artwork. Enhance your digital drawing skills and improve the quality of your line art with these practical tips and techniques.