This causes all nodes, zones, gates, and text fields to be located in a grid pattern with the minimum spacing specified by this preference. This is useful for drawing new networks, but should be turned off for editing existing networks. Note that all node icons are 10 x10. A snap to grip setting less than 10 will permit nodes to overlap which can obscure their connecting link(s). For now, turn this on by clicking the check box to place an "x" in the box, and enter 20 for the grid spacing.