@divthecutie When you visit a page you have bookmarked (including in speed dial) the heart icon at the right of the address field will be filled instead of an outline. You can click on this icon to show a palette with the image to be used, the bookmark folder to save it to, and a trash can if you want to remove the bookmark. There are arrows to the left and right of the image which can be used to select a different image from those on the page. You can also use the heart icon when it is an outline to add a new bookmark, which is what Leo mentioned.
