Open a document.
Right click on the section where you would like to create a bookmark.
Choose “Bookmark” from the context menu.
A small red star appears to the left of the section which allows you to recognize a bookmark at a glance.
A small star symbol also appears on the left in the tab bar. The grey highlighted number indicates how many bookmarks you have in a document.
Clicking on this symbol will give you an overview of all your bookmarks.
Click on the entry and you will be directly guided to the location in the document.