PURPOSE Smaller presentation files are easier to email, upload, open, and present. COMMON CAUSES Large images, embedded videos, unused slide masters, pasted screenshots, and copied content from older decks can increase file size. WHAT TO DO Compress images, remove unused slides and layouts, replace embedded videos with links when appropriate, and save a clean copy. CHECK Open the smaller version and confirm images, charts, videos, and fonts still work. BEST PRACTICE Keep a high-quality original copy before reducing file size.