Layers

List all the laters in the image , displaying the layer names and thumbnails of the content on each layer.

Lock Icon

indicates that the layer is protected.

Eye Icon

indicates that the layer is visible in the image window. If you click the eye, the image window no longer displays that layer.

Contains a color or an image that shows through the transparent areas of subsequent layers. An image can have only one background.

To convert a background layer into a regular layer

Double-click the name Background in the Layers panel, or choose Layer > New > Layer From Background.

To convert a background layer into a regular layer

Select a layer in the Layers panel.
Choose Layer > New > Background From Layer.

The stacking order determines how the image is viewed—you can change the order to make certain parts of the image appear in front of or behind other layers.

Affect how the color pixels on one layer blend with pixels in the layers underneath.

It can be added to an image to apply color and tonal adjustments without permanently changing the pixel values in the image.

It combines all the layers into a single background layer. you cannot edit layers once you’ve flattened them. It’s a good idea to save a copy of the file with its layers intact, in case you need to edit a layer later.

provide one-click flexibility in switching between different views of a multilayered image file. A layer comp is simply a definition of the settings in the Layers panel.

Layer visibility

Is whether a layer is showing or hidden.

Layer position in the document.

Layer appearance

Its whether a layer style is applied to the layer and the layer’s blending mode.