I think that I get it now. The issue is that I was setting the grid to 1mm and the snap size to 1mm and then the grid was disappearing (hidden by my model in top view). So this is where the confusion came from. Setting the Grid Sections to 5000 or bigger, solved the issue as the grid is now expanding beyond my model. Also, I thought that Grid Size was the equivalent of Length and Width in Maya (total grid size). I think that I'll be able to figure it out with this information.

Thank you!