Custom : THE option to edit the shape, tamale and outline of your icons in OPPOĪll these menus allow you to change the size of the icon interface and the size of the text that appears above them, but only the “custom” function will allow you to change the shape.HydrogenOS : The classic icons of the old OnePlus operating system that, remember, is OPPO’s “sister”.Pebble : Almost round icons inherited from OxygenOS and typical of this operating system.Material Style : Check this option to set the classic “Material Design” style Google icons.Default : The last type of icon created on the mobile is shown here.