What's the purple border? How can I see the actual render region?

Hi,

from the editor I'm trying to figure out what a camera's rendering area will be, but to no avail.

I want the render image displayed below to be 1200 * 300 pixels in size, with the model right in the center of it.

  • How can I see from the editor window what area is supposed to be rendered?
  • What is the meaning of the purple left and right borders when a camera is selected?

Your help is appreciated.

SolidworksPhotoview 360