Clicking on the Bookmarks icon in the toolbar will show you the Bookmarks panel on the left side of the application. To create a new set, click on the Create new Bookmark Set icon and then choose a path on your computer and type a name. It will be saved as a .XML file and each time you add or delete a bookmark to the set, this file will be updated. You can share this file with someone or somewhere else to import or backup. If you have a Bookmark file and want to import it to your Kiwix, click on the Import Bookmark Set icon in top of the panel and then select the .XML file from your computer.