That button appears dynamically when UltraWebTab has hidden tabs on the right side.
Note: If the length of a string is less than 5, or it does not contain the "." character surrounded by letters or digits, then that property is rendered as explicit text string, rather than as an image.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2