Ключевые слова: 4k, adult, background, business, business concept, business man, businessman, concept, creative, creativity, diagram, draw, drawing, education, fast, fast motion, gesture, glass, hand, handwriting, hologram, male, man, marker, men, office, pen, person, presentation, reality, screen, sketch, speed, student, studio, surface, teacher, technology, virual, whiteboard, woman, work, worker, working, workplace, write, writing, young,