Using Debugging Information Windows
WinDbg has ten kinds of debugging information windows. You can have only one instance of the following windows open at the same time: the Debugger Command window, the Watch window, the Locals window, the Registers window, the Calls window, the Disassembly window, the Processes and Threads window, and the Scratch Pad. In addition to these eight individual windows, WinDbg can display multiple Source windows and Memory windows at the same time.
This section describes the features that are common to all of these windows: