Bookmarks give you the chance to save your coordinates and label them into “Friend”, ”Enemy” or “Favourite”, while also being able to name them. You can purchase additional Bookmark slots for Gold from the Store.
Once purchased, you can activate the bookmarks either by tapping on the “Use Item” button or from the Bookmarks tab, by tapping the “Add Bookmark Slot” button.
To bookmark a tile on the Front Map, first tap on it, then tap on the Bookmark sign in the corner of its info card. A hidden menu will appear, allowing you to label and save the Bookmark. You can see all your saved Bookmarks in the Bookmark Menu at the top of the screen.
Keep in mind that Bookmarks save coordinates of tiles on the Front Map, not Bases or Resources Tiles. A Base you marked as a friend or foe can teleport - in this case, the bookmark will remain on the same coordinates; it will NOT follow the Base to its new coordinates.