Select All The Select All command selects all cells in the grid. If you wish to cancel the Select All command, click outside the grid, and the cells will no longer be highlighted. You can avoid the Select All command by setting default values for your overlays with the Layer Qualities window at the time the layer is created. The Select All command will highlight all cells in the model, even if the model is magnified significantly so that only a small portion of the grid is shown in the Model window.