The Debug Viewer pane contains three tabs to assist you in debugging your test or function library
It contains the following tabs
The Watch tab enables you to view the current value of any variable or VBScript expression that you added to the Watch tab.
During a run session, the Variables tab displays the current value of all variables that have been recognized up to the last step performed in the run session.
The Command tab enables you to execute a line of script in order to set or modify the current value of a variable or VBScript object in your test. When you continue the run session, QuickTest uses the new value that was set in the command.