Paint Shop Pro 9 gives you the option of displaying open images in a tabbed format.
To set this option, choose Window > Tabbed Documents.
When this option is on, the active image covers the entire workspace,
and its bolded file name appears in a tab across the top of the workspace.
Each open image has a separate tab. To view another image, click its tab.
To access an image tab not in the current view, click the 
and 
buttons.
To close an image in tabbed format, click the Close button 
.
Note: When the Tabbed Document option is on, the concept of minimizing and maximizing the image window no longer applies.