The Divi Theme's visual builder overlays the front-end view of your website with a range of buttons, borders and popup modal boxes which can be used to manipulate the webpage. These elements are animated onto the page, often scaling from zero height and visibility to full size and visibility, often accompanied by a "bounce" animate at the end. While stylish, you might find yourself getting tired of all the animations and perhaps wanting to save yourself waiting the few milliseconds they take to play out. Fortunately there is a built-in Divi setting for disabling the animations.
To disable the animations, simple click on the "three vertical dot" menu button in the visual builder, and then set "Builder Interface Animations" to "Off". Close the settings, save your page in visual builder and you're done.