I am self teaching vop/vex.. and I really want to see what value is going inside of each nodes. like number value.

I remember that when I watched some tutorial long time ago.. there was two sops that shows the value.. and one was print and I forgot the other one.

By that time, the print sop worked, but I can't get it working on my mac…
I checked the checkbox for the separate window, but it also didn't work.

Am I supposed to connect the print sop to other sop to get the value?
Or is it not supposed to work on mac?

I am using Houdini12…

Thank you.