I am new to this. Sorry guys, about asknig stupid questions. Unfortunately, the "teacher" is running a 2017 version when demonstrating, which does not match what is in the Solidworks Essentials from 2018 and the 2019-2020 software. As student you are "encouraged" to learn w/o bothering the teacher.  I am learning quickly.

I wonder if there is a function in 2019-2020 where you can make two crossing lines go through the center point (origin)?

Also, how to define a plane in 2019-2020?

Is there a good book or good books or a decent Youtube channel that covers these things which you can recommend?

This is from the Youtube video: "Solidworks - Shell and Draft", at 4:13 (5:57)

Solidworks - Shell and Draft