There may be other ways to accomplish this, but this is how I did it: search for the book you want to flag it will have an oblong green box near it that says "want to read" on the left, and 3 little books leaning against each other on the right. To add the book to your "want to read" list - click on that part of the green box. Mouse over the 3 little books and you get 4 options - read, currently reading, want to read, add to shelf.
Add to shelf lets you place the book in one of your shelf categories - you are given a "favorites" category, but you can add others with the "add" option that comes up under the "shelf" option. I hope all that makes sense.
Example: I just searched Swallows and Amazons by Arthur Ransome. I hovered over the 3 little books on the green button, then chose the "read" option. Then I hovered over it again and clicked the "shelf" option. I typed in "love love love" and clicked the add button. Now I've got a new shelf called "love love love" for my super favorite books I'm just crazy about.
I hope all that is useful. Let me know if it doesn't work for you.
search for the book you want to flag
it will have an oblong green box near it that says "want to read" on the left, and 3 little books leaning against each other on the right. To add the book to your "want to read" list - click on that part of the green box. Mouse over the 3 little books and you get 4 options - read, currently reading, want to read, add to shelf.
Add to shelf lets you place the book in one of your shelf categories - you are given a "favorites" category, but you can add others with the "add" option that comes up under the "shelf" option. I hope all that makes sense.
Example: I just searched Swallows and Amazons by Arthur Ransome. I hovered over the 3 little books on the green button, then chose the "read" option. Then I hovered over it again and clicked the "shelf" option. I typed in "love love love" and clicked the add button. Now I've got a new shelf called "love love love" for my super favorite books I'm just crazy about.
I hope all that is useful. Let me know if it doesn't work for you.