When you are in the creation part of your book, you first need to click on the photo. You will then see a blue frame appear around your photo and a toolbox below.
To add a filter, click on the Effect button and then on the filter that corresponds most to what you desire among the models offered.
The filters offered correspond to the most frequent requests of our customers: black and white effects, vintage effects, blurry effects, sepia, etc...
To change the shape of your photo, click on the Shape button and choose the shape that pleases you.
You can only use one filter per photo, so if you want to use a light filter and a contrast filter it is better to choose the one that will enhance your photo the most. However, you can combine a filter plus a shape to add character to your layout.