Step-4: From the thumbnails under Apply a theme section, pick up the one that you prefer to use. Step-3: On the following page, select Themes from the left pane and jump over to corresponding right side. Step-2: Once Windows Settings app appears, hover the cursor over Personalization. Step-1: Launch Start Menu and perform a click on the cog icon on the left side (see screenshot). Way-5: Through Start menu Way-1: Via Settings