With this option, you can set/reset a bookmark, so you can jump in your code with the Search, Goto Bookmark option.
You can give each bookmark a name. Move the mouse cursor to the bookmark and right click. An editor becomes visible and you can enter a description for the bookmark. This description will be added to the bookmark in the menu.
The description will also become visible when you move the mouse over the bookmark number.
Bookmarks are stored in the project file.
Shortcut : CTRL+K + x where x can be 1-8