It is a simple face (1 m * 2 m rectangle)

I was following the tutorial mentioned at

In this tutorial, the instructor drew a rectangle in Ansys Discovery and run the simulation in Ansys Mechanical.

So I followed his steps, created Face Meshing, and tried to adjust the mesh size by using Face Sizing. The images below show what I have at this moment. The mesh I have here is the default size since it does not allow me to change it.