I'm not in Anna's team ( but can dream about it
)
I use mine mostly as a background for multi photo templates, the layers are separate so you can use several colours to match your photos. It works well with the gradient tool too.
Just paint them or use a paper or texture or both on them.
you don't need to use every layer , sometimes I just need a bit because I don't like a straight edge on something.
you can also just blend a photo into it.
do a search in the gallery and you will find several examples or look at them in the shop and every set has a couple of examples. Have fun playing with them