My first question in this group is to find out how to make my screen layout match the actual table on the CNC laser.

I have a set of end-stop kit on their way from China.
I have to admit that I would rather like to get it working without the end stops first.

How do I do the correlation between table and screen?

I have watched some You-Tube items on this, but need the simplest explanation because I've tried to follow them but end up just the same.