Today, I set up parameters and measurements to understand the inner parts of a document.
To begin, head to the File menu at the top right of the screen, then choose New. Inside the dialog box, set the bleed values to 20 pt then click OK. After creating the new document, head to the View menu and select Show Print Tiling and Hide Artboards.
Once a document is opened, there’s a tab with its listed, unique information. For example, if tab read as Untitled-7 @ 76% (CMYK/Preview), then it’s unnamed with a 76% magnification with color mode.
Going back to the document, there’s 3 squares that are dashed and bolded around the artboard. The innermost set of lines represent the actual printable area, the second being paper size, the third is the bleed region.