Hi Keith,

I don't have P&GD10 to check, but if you have 'new view' under Window,
Click image for larger version.  Name: view.png  Views: 146  Size: 8.0 KB  ID: 115354 Click image for larger version.  Name: snap02.png  Views: 174  Size: 9.1 KB  ID: 115355
you can have an enlarged view to 'erase" in and cascade a small view to see the effect. HTH