What enables you to move up and down in a document text that is not visible?

The ability to move up and down in a document text that is not visible is typically enabled by a scrollbar or keyboard shortcuts. Scrollbars allow users to navigate through the document by dragging or clicking on the scrollbar handle, while keyboard shortcuts like the arrow keys or Page Up/Page Down keys provide quick navigation. Additionally, features like search functions or bookmarks can help locate specific sections within the document.