The Page Invert and Crop as New Page tools in the Image Tools group on the Page tab allow you to easily update your job pages.

Invert -  Inverts the black and white colors on a page so the areas that were black now will appear white.

Crop as New Page - Allows you to crop a page down in size and save it as a new page in the project all in one step.

Both tools automatically run when you click the button.