.Most dialogs that correct images, apply effects, or modify selections have two preview windows that show the image before and after changes are applied. Use the window controls to zoom the preview in or out, pan it, or proof changes on the actual image.
You can show or hide the preview windows. When you hide previews, use the main image window to proof changes. In each Paint Shop Pro dialog with preview windows, you can size the dialog by clicking and dragging a corner. Expand a dialog when you want the preview windows to be large enough to see detailed changes. You can also double-click the dialog title bar to maximize the dialog.
To display or hide preview windows:
Click the Show/Hide Previews button .
To zoom the image preview:
Click the Zoom In 
or Zoom Out 
buttons. The zoom percentage
displays next to the Zoom buttons.
To pan the image:
Do either of the following:
Move the cursor over either preview window (the cursor changes to a hand), and then click and drag the image.
Click and hold the Navigate button 
, and then center
the selection rectangle over the part of the image you want to display.
To proof changes in the main image window:
Click the Proof button 
.
All settings in the dialog are applied to the main image window. Each
time you change settings, click the Proof button to view the changes in
the main image window.
To set automatic proofing:
Click the Autoproof button 
.
Paint Shop Pro automatically applies all dialog settings to the main image window each time you change a setting.