Dashboard Tile Auto-fit

Created new dashboard and let it auto-populate. Now I want to set the grid at a certain size and have the tiles autofit to that grid. If I set the grid to 4 columns x 8 rows, I end up with two columns and 15 rows of tiny tiles that you cannot read. Nothing seems to work.....I even tried setting width and height manually.

Is it my device (old Galaxy S4 phone) or something I'm doing wrong?

Yes, your old phone doesn't support css grid. So it falls back to just a list of tiles.

OK. Thanks.