Turn the tile in the direction that you want the tile to run. For a straight tile, align the corner of the tile with the two chalk lines on the floor. For a tile with an angle, align the mark on the back of the tile with the center mark of the room. Turn the tile to the angle you wish to use.urn the tile in the direction that you want the tile to run. For a straight tile, align the corner of the tile with the two chalk lines on the floor. For a tile with an angle, align the mark on the back of the tile with the center mark of the room. Turn the tile to the angle you wish to use.