Sumita Sikka is an assistant professor in fashion design. She provides tips for effective PowerPoint presentation design including limiting text by using fewer words per line and lines per slide. She recommends using sans-serif fonts like Arial and Verdana in sizes between 24-48 points. For colors, she suggests limiting the number to a maximum of four colors per slide with bright colors for small objects and contrasting colors for better impact. She also advises keeping slide designs clean and uncluttered with blank space around text and images.