The reasons for the results of Test 2 and Test 3 are afterimages. Bright light creates an afterimage in the eye. The same way you see light in your eye seconds AFTER the doctor shined a light into it. This afterlight makes it possible to see what was there seconds ago. The brightness of the afterimage of the cinema canvas produces such afterimages and thus helps the movie to be flickerfree.
You can download Proofing Tool packs for additional languages. Each pack will include a spell checker and, depending on the language, additional proofing tools such as a grammar checker, thesaurus, or hyphenation. Note that this is not a full language pack.
Prepress proofing. A contract proof usually serves as an agreement between customer and printer and as a color reference guide for adjusting the press before the final press run. Most contract proofs are a prepress proof. The primary goal of 'proofing' is to serve as a tool for customer verification that the entire job is accurate. Prepress proofing (also known as off-press proofing) is a cost-effective way of providing a visual copy without the expense of creating a press proof.