Layers panel overview
The
Layers panel lists all layers, layer groups, and layer effects in
an image. You can use the Layers panel to show and hide layers,
create new layers, and work with groups of layers. You can access
additional commands and options in the Layers panel menu.
Photoshop Layers panel
- A.
- Layers panel menu
- B.
- Layer
Group
- C.
- Layer
- D.
- Expand/Collapse
Layer effects
- E.
- Layer effect
- F.
- Layer
thumbnail
Display the Layers panel
Choose Window > Layers.Choose a command from the Layers panel menu
Click the triangle in the upper right
corner of the panel.
Change the size of layer thumbnails
Choose panel Options from the Layers
panel menu, and select a thumbnail size.
Change thumbnail contents
Choose panel Options from the Layers
panel menu, and select Entire Document to display the contents of
the entire document. Select Layer Bounds to restrict the thumbnail
to the object’s pixels on the layer. 
Turn
off thumbnails to improve performance and save monitor space.
Expand and collapse groups
PDF (adobe.com)
