How do i set the depth of the engrave

1

I am looking at inlaying a 4x4 tile into a piece of wood, how do I set the depth of the square engrave so it comes out flush?

2

What is the thickness of the tile? That is your pocket depth. If you are gluing the tile in then add about 1/16” to an 1/8” depending on the type of glue you plan on using. It would be the same for thinset.