Tick Marks Below Time Bar

[kingdm95]

Hi everyone,

On some videos there are these tick marks below the time bar that are I assume are "bookmarks" or "timestamps", but I am not sure.

I have tried searching for "bookmarks" and "tick marks" but those appear to be something else. "Marquee" seems like adding text to the screen? I am sorry for the confusion.

I have included a screenshot of an example of the "tick marks":

https://imgur.com/a/lg0JjFo

I was wondering if someone would be able to explain what these are, and how to add or remove them from videos/the time bar (if possible?).

Apologies for the confusion and thanks in advance.

[Lotesdelere]

Those tick marks automatically appear when your file contains chapters.