It could be enlarged or reduced as needed, and could provide a reality check and global navigation method in case the user gets lost in space (note that this kind of thumbnail view is useful for navigating large 2D diagrams as well).

• 并且为避免用户迷失在空间中，它提供了一个现实检查和整体导航的方法（注意，这种缩微图在导航大的二维图像时也很有用）。