Cute, huh? Easy too. Let me show you two tricks to make this work.
Make sure you cut a flat base so that it stays even. (You can see I used my business card.)
Cut the slit at an angle, so its easily read from above.
PS. My hubbie made that cutting board. We’re a family of dabblers.
Masterdabbler 
You should blog how he made the cutting board!! 🙂