The Layer Properties dialog box allows to change the properties of individual layers. It comprises of several checkboxes such as Name, #, Visible, Print, Active, Lock, Snap, Glue, and Color.
The Name field lists the type of layer, while the # field lists the number of shapes in that type. In the following example, we see that there are nine equipment shapes in this diagram.
There is a row of checkboxes for each layer type that can be selected or deselected. Unchecking the Visible checkbox makes the shape invisible in the drawing. If the Print checkbox is checked, the shape will be printed along with the others. Unchecking the Print checkbox will not print the shapes in the layer.
Similarly, layers can be made active or locked. Shapes in an active layer can be manipulated without affecting the other shapes or layers. When you lock a shape, Visio prevents any changes from happening to the shape. You cannot drag the shape or change its contents. Snap and Glue will be checked, if the shapes are allowed to snap to a grid. You can also represent a layer by a color for easy recognition.
When you represent a layer by its color, the shapes belonging to that layer will also be colored in the diagram. This is useful if you want to differentiate a set of shapes from another.