clear all bookmarks -
You can add a page to your personal bookmarks by clicking on the bookmark icon at the beginning of the text, next to the controls.
It is possible to use the quick bookmark, which is always available on the screen - the bookmark icon with a plus sign, which is located on the top left. It saves the position where you finished reading, but only works on the same device where it was added.
A quick bookmark can be loaded from any page by pressing the bookmark button with the arrow in the upper right.