Starting in version 10 (VPX), Visual Pinball has a great feature that allows you to import and export your backdrop POV settings. These Settings include the landscape/portrait (0/270), x/y scale and position (how wide and tall the table is on your screen) and incline/layback, etc…
If you want to manually change the values, open the table and click on the backlight and click on options. you will see the different values that can be changed.
You can also import the file created by folks and use the. Here the download
Once you have the table set the way you want, you can export the POV file.
The backup POV import/export is an incredibly useful feature in VPX that is, perhaps, under-utilized. Tell all your friends about it.