The VF has at least three generations of signage and I have seen a dozen or more kinds of markers. Here are a few of them on one post.
At the beginning the signage was minimal, just at places you have a choice and sometimes not even then. Since we got into Tuscany we are getting many more signs. What you want are clear signs at the choice points and frequent “yes don’t worry, you are still on the VF” signs. On the Camino the yellow arrows do this. On the VF this is done with the white over red stickers, second from the top above. Basically a bumper sticker, it can go on vertical posts or any surface. They give you reassurance you didn’t miss a turn.