Bookmark Manager: A. Toolbar, B. Bookmark list, C. Add New Bookmark
The Bookmark manager lets you edit multiple Bookmarks at the same time.
Shows a list of all the Bookmarks in the scene. You can change each bookmark's name, color, or duration, and access specific commands for each bookmark in the scene.
Choose a color, name, start and end time, for a new bookmark, and click Add.
You can also press Alt (Option) + Shift + T to create a Bookmark without opening the Bookmark window. It will be unnamed and a random color is assigned.