i spend most of this month to watch Photoshop and illustrator courses and i am very happy that i have successfully completed both courses. when i was watching fundamentals and colors i thought i know all of these, but in mastery i missed so many things especially in Photoshop mastery course. it was 13 hours very detailed course. i was using some of the tools the wrong way and ignore some very useful options. i recommend fellow sellers to learn from fiverr courses.