Is there a way to add a thin, ~1 inch tall, rectangular marker to the extreme right edge of each page in a large document to differentiate chapters (each chapter marked at a decreasing vertical position)? I want to provide a visual cue when either quickly scrolling/flipping through a long document, or to be able to visually see the chapters when looking at the physical edge of the printed thesis.
I am not sure if this typesetting element has a formal name (which has made it hard to search), but I feel like I've seen it in theses typeset in LaTeX before.