In this paper, we present the design and implementation of SOPView+, a n object browser that supports navigating a large database by changing base object. Base object is a n object which is a basis for navigation; forward navigation is provided for the reference paths ahead of the base object and backward navigation for the ones behind it. SOPView+ allows users t o change the base object along the reference hierarchy among a number of database objects; this makes it possible for them t o explore a large database until they find objects of their interest o n the limited screen space, solving the screen real estate problem. SOPView+ also supports extended synchronized browsing, which synchronizes displaying objects along both forward and backward navigational paths.