Abstract: When designing integrated circuits, RTL source code is received and converted into objects. Objects may include a reference to relevant lines of source RTL code. A graphical user interface (“GUI”) displays the RTL code in an RTL window. The GUI also displays one or more representations of the objects in additional windows. The GUI uses references between the objects and the RTL code to map between the RTL code window and the window(s) of the one or more representations. When a user highlights a portion of one window, the corresponding portions of other windows are automatically highlighted by the GUI. A tool in accordance with the invention optionally operates in conjunction with one or more analysis tools that automatically highlight portions of one or more windows to illustrate potential errors or timing issues. Timing diagrams showing timing delays between various elements of a block may also be displayed.