How do you display the checker texture in blender 2.9+?

I believe you can find an answer to this in Kent's treasure chest project:

https://cgcookie.com/lesson/laying-out-uvs

Start viewing around the 24:22 mark.  Last week, I was doing some UV layouts in 2.91 and generated the checkered texture.  It is very similar to 2.8, which is what the treasure chest project used.

Hope this helps.

Splat

Ah, thank you!