When drawings contain many layers -- and some can contain thousands of them, nanoCAD helps you control them through filters, groups, and states. Filters reduce the length of layer names by showing those that match only certain criteria, such as the same color or similar name. Groups create subsets of layers, such as all those related to text; you can then toggle the display of the group independently of all other layers. States save the state of the properties of layers, such as all colors set to black. In this video, you learn how to use the Layer command to create and use filters, groups, and states.