What is the name of the non-visible design tool that includes important safe areas?

The term that refers to the non-visible design tool which includes important safe areas is known as "Safe Margins." Safe Margins are crucial in video editing and production as they indicate the boundaries within which important content should be placed to ensure it is not cut off or obscured when displayed on various screens or in different formats. This is particularly relevant when dealing with different aspect ratios or when content is being viewed on various devices, as it helps maintain visual integrity and uniformity in presentations.

This concept contrasts with the other terms. For instance, "Safe Zones" often refers to the visible areas where content should ideally be displayed, but not specifically to the purpose of marking boundaries for safety. "Layout Grids" are typically used in graphic design to structure content layout visually, rather than providing a defined area for content safety. "Design Guides" may pertain to general principles of design and layout rather than specifically indicating safe areas for content. Thus, Safe Margins specifically denote the invisible boundaries essential for maintaining the integrity of the visual presentation across various viewing platforms.