How does html make icons for drop-down menus? How to make the icon picture of the drop-down menu? Website design is the main work of website production. Drop-down menu is a common design method in websites. Its common size is 1920x600 pixels and 1024x768 pixels, while the drop-down menu size is 1080x 1920 pixels. There are some similarities in the use of picture size and color in the drop-down menu, including that it can use a combination of pictures, fonts, colors and letters consistent with the main title. 1.2.3. 1 Click the image attribute check button, and click the image attribute check button to change it to the attribute of related content.