After reviewing the initial analysis results, you may want to refine your model. You can do so from the main analysis window or from SAS/LAB software's main window.
To refine your model from the main analysis window, select Locals from the menu bar, and select 'Change analysis...' from the pull-down menu. In the resulting window, you can add or subtract factors, change the model type, and so forth.
To return to the main window from the analysis window, press the END key or select 'End' from the File pull-down menu.