Hello, does anyone know what command I can use to open two .mag designs, since when I put magic file1 file2 it only opens one.

It loads both, but it will only show the last one in the layout window. You can open a new window if you want to view both layouts at the same time (but beware---I have run into some issues with some of the graphics interfaces when attempting to display more than one layout window).

So I understand what can I do to connect two blocks designed in different files?

Each file represents a cell. If you use

load

you will edit the cell directly. If you want to place an instance of the cell, then you want to create a new top-level cell and use

getcell

to place instances of other cells into it.

Thanks