When you are looking at a list of results, you can see boxes around the result numbers. This allows you to manually select results to add to favorites, etc. Once you have selected items, you can click on the favorites pin at the top right of the search results, or the ellipsis for more actions.
You can also select the entire page of results using the box at the top of the search results. Once you select that, you also have the option of selecting the top 50 results.