There is magic in the "Coloring Book for Me" app. To get it to work, tap the "magic wand" icon on the left to the colour palette.
In the pop-up menu you will see 2 options: textures and MagicPhoto.
Tap the first one in order to apply textures to the image. On the background, you will see how the original image changes and can always choose the "none" option if you don't like these default filters. To exit this menu, simply tap the cross icon or anywhere on the image.
In this example, we've chosen the "leather" filter.
*Note: You can learn about the MagicPhoto feature here
We try to assist you as much as we can but if you have questions or something is left out, please contact us at firstname.lastname@example.org. We'd be glad to help you.