We've covered the importance of giving feedback in Book Creator in a separate article - check that out if you haven't already.
To get started, head over to the Teacher Dashboard and enable the Feedback Sticker Pack by clicking on the app card. You can choose to enable it just for you, or for your students too. Note - you will need a premium subscription to be able to add the Feedback Sticker Pack to your books.
To access the Feedback Sticker Pack in Book Creator, click on the + button, then More and choose Feedback Sticker Pack.
You can explore all of the Feedback Stickers by scrolling down or using the navigation icons at the top of the list. When you've chosen the one you want, click on it or drag it onto the page.
Once it's added, you can reposition or resize it just like any other image. You can also add hyperlinks and alt text with the Inspector (i button).