You can define the following four properties under Component page:
Loading Window: You can customize the background color of Loading Window and the color of waiting image and progress bar.
Scene Viewer: You can customize the background, bar color and width/height of Scene Viewer, the style of progress bar, etc.
Font: To set the initial font for text on components.
Hint: To define the color, font, border color and background color for tour hints, also, to customize the time interval between hint and the component which the hint is added to, or display time of hint.
Scrollbar: Set scrollbar color.
JPEG Quality: To set the JPEG quality of the scene or map during slice displaying in the publish settings.
Hotspot: to define whether to zoom hotspot in scale with FOV.