It is possible to customize the include to your own needed settings (appearance and spacing). Some of this settings can't change with a function, but you can change it in your code with global variable
TabBarGadgetInclude. The variable has the following fields and you can change their value.
Field Default value Description \Padding6Space between the content and the border of the tab. \Margin4Space between the tab and the gadget border. \ImageSpace3Space between the image and the text in a tab. \CloseButtonSize13Size of the cross to close the tab. \TabBarColorsystem Background color of the tab bar. \BorderColorsystem Color of the border of the tabs. \FaceColorsystem Color of the background of the tabs. \TextColorsystem Color of the text in a tab. \HoverColorPlus$FF101010Addition of the background color if the mouse is over the tab. \ActivColorPlus$FF101010Addition of the background color if the tab is selected. \ArrowWidth10Width of the arrow of the navigation. \ArrowHeight16Height of the arrow of the navigation. \Radius3Radius of the rounding of the tab. \MinTabLength0Minimum length of a tab. \MaxTabLength32767Minimum length of a tab. \FadeOut32Size of the blending in the navigation. \WheelDirection1Direction of the scrolling with the mouse wheel ( -1or1)\EnableDoubleClickForNewTab#TrueA left double click send the #TabBarGadget_EventType_NewItemevent.\EnableMiddleClickForCloseTab#TrueA middle click send the #TabBarGadget_EventType_CloseItemevent.