Selecting and editing layers (and layer objects) are essential operations when working with multi-layered documents. Layers can also be renamed for easy identification or given a unique color to differentiate objects that belong to different layers.
To select a layer:
In the Layers panel, click the layer name. This displays all layer objects as one selection in your workspace.
To select a specific layer object:
In the Layers panel, expand the layer to show its contents by clicking the layer's arrow.
Double-click the layer object entry. This displays the chosen object.
To select multiple layers (or layer objects):
In the Layers panel, -click each layer (or layer object).
To change a layer name or color:
-click the layer and select Properties.
Type a new name or select a new layer color by clicking the color swatch.