Page guidelines inside the designer:

Bleed Line: The red guideline is called the bleed. You must make sure to bring your backgrounds to the red guideline. If you decide to have your pictures or images or type fill the entire page then make sure they bleed well. Don’t expand anything to the bleed that you don’t want cut off!

Cut/Trim Line: The black guideline is where your pages will get trimmed down to during the printing process. Paper can shift during the trimming process and the trim line can vary slightly, which makes bleed and safe zones very important.

Safety Line : The Purple guideline is your margin which is also the safety zone. Any items or content you do not want to get cut off must stay within the purple guidelines, to ensure the text doesn’t get cut off or end up too close to the edge of the finished page, should the paper shift during the trimming process.